diff --git a/fs/driver/fs_closeblockdriver.c b/fs/driver/fs_closeblockdriver.c
index defd3dcb5cdf58cf761ebc7e7678de2f6f89730c..7c9c60244d91bb04d416e87d6149136e22491e0f 100644
--- a/fs/driver/fs_closeblockdriver.c
+++ b/fs/driver/fs_closeblockdriver.c
@@ -84,7 +84,7 @@ int close_blockdriver(FAR struct inode *inode)
 
   if (!INODE_IS_BLOCK(inode))
     {
-      ferr("inode is not a block driver\n");
+      ferr("ERROR: inode is not a block driver\n");
       ret = -ENOTBLK;
       goto errout;
    }
diff --git a/fs/driver/fs_findblockdriver.c b/fs/driver/fs_findblockdriver.c
index b2b47e4ecb4bb8c682b60f401506bef6db2b01c1..8667beaef23eeb8cd350a642883e791a6ad0e08d 100644
--- a/fs/driver/fs_findblockdriver.c
+++ b/fs/driver/fs_findblockdriver.c
@@ -96,7 +96,7 @@ int find_blockdriver(FAR const char *pathname, int mountflags, FAR struct inode
   inode = inode_find(pathname, NULL);
   if (!inode)
     {
-      ferr("Failed to find %s\n", pathname);
+      ferr("ERROR: Failed to find %s\n", pathname);
       ret = -ENOENT;
       goto errout;
     }
@@ -105,7 +105,7 @@ int find_blockdriver(FAR const char *pathname, int mountflags, FAR struct inode
 
   if (!INODE_IS_BLOCK(inode))
     {
-      ferr("%s is not a block driver\n", pathname);
+      ferr("ERROR: %s is not a block driver\n", pathname);
       ret = -ENOTBLK;
       goto errout_with_inode;
     }
@@ -115,7 +115,7 @@ int find_blockdriver(FAR const char *pathname, int mountflags, FAR struct inode
   if (!inode->u.i_bops || !inode->u.i_bops->read ||
       (!inode->u.i_bops->write && (mountflags & MS_RDONLY) == 0))
     {
-      ferr("%s does not support requested access\n", pathname);
+      ferr("ERROR: %s does not support requested access\n", pathname);
       ret = -EACCES;
       goto errout_with_inode;
     }
diff --git a/fs/driver/fs_openblockdriver.c b/fs/driver/fs_openblockdriver.c
index 67a955cf579b3e8a068bfb331264716df9e1f215..9a42020bf787bbcfd0ecf03140e7dd6c27f9efa1 100644
--- a/fs/driver/fs_openblockdriver.c
+++ b/fs/driver/fs_openblockdriver.c
@@ -96,7 +96,7 @@ int open_blockdriver(FAR const char *pathname, int mountflags,
   ret = find_blockdriver(pathname, mountflags, &inode);
   if (ret < 0)
     {
-      ferr("Failed to file %s block driver\n", pathname);
+      ferr("ERROR: Failed to file %s block driver\n", pathname);
       goto errout;
     }
 
@@ -110,7 +110,7 @@ int open_blockdriver(FAR const char *pathname, int mountflags,
       ret = inode->u.i_bops->open(inode);
       if (ret < 0)
         {
-          ferr("%s driver open failed\n", pathname);
+          ferr("ERROR: %s driver open failed\n", pathname);
           goto errout_with_inode;
         }
     }
diff --git a/fs/fat/fs_configfat.c b/fs/fat/fs_configfat.c
index 3064a82f92492b1de44a749375bff4e95a33dfa6..11fc358e2ee5b5b5d1a1f2e0fee4d851361f15c2 100644
--- a/fs/fat/fs_configfat.c
+++ b/fs/fat/fs_configfat.c
@@ -473,7 +473,7 @@ mkfatfs_tryfat12(FAR struct fat_format_s *fmt, FAR struct fat_var_s *var,
 
       if (config->fc_nclusters + 2 > maxnclusters)
         {
-          ferr("Too many clusters for FAT12: %d > %d\n",
+          ferr("ERROR: Too many clusters for FAT12: %d > %d\n",
                config->fc_nclusters, maxnclusters - 2);
 
           return -ENFILE;
@@ -550,7 +550,7 @@ mkfatfs_tryfat16(FAR struct fat_format_s *fmt, FAR struct fat_var_s *var,
       if ((config->fc_nclusters + 2 > maxnclusters) ||
           (config->fc_nclusters < FAT_MINCLUST16))
         {
-          ferr("Too few or too many clusters for FAT16: %d < %d < %d\n",
+          ferr("ERROR: Too few or too many clusters for FAT16: %d < %d < %d\n",
                FAT_MINCLUST16, config->fc_nclusters, maxnclusters - 2);
 
           return -ENFILE;
@@ -622,7 +622,7 @@ mkfatfs_tryfat32(FAR struct fat_format_s *fmt, FAR struct fat_var_s *var,
       if ((config->fc_nclusters + 3 > maxnclusters) ||
           (config->fc_nclusters < FAT_MINCLUST32))
         {
-          ferr("Too few or too many clusters for FAT32: %d < %d < %d\n",
+          ferr("ERROR: Too few or too many clusters for FAT32: %d < %d < %d\n",
                FAT_MINCLUST32, config->fc_nclusters, maxnclusters - 3);
 
           return -ENFILE;
@@ -696,7 +696,7 @@ mkfatfs_clustersearch(FAR struct fat_format_s *fmt, FAR struct fat_var_s *var)
 
       if (fmt->ff_rsvdseccount < 2)
         {
-          ferr("At least 2 reserved sectors needed by FAT32\n");
+          ferr("ERROR: At least 2 reserved sectors needed by FAT32\n");
           fatconfig32.fc_rsvdseccount = 2;
         }
       else
@@ -756,7 +756,7 @@ mkfatfs_clustersearch(FAR struct fat_format_s *fmt, FAR struct fat_var_s *var)
 
           if (mkfatfs_tryfat12(fmt, var, &fatconfig12) != 0)
             {
-              ferr("Cannot format FAT12 at %u sectors/cluster\n",
+              ferr("ERROR: Cannot format FAT12 at %u sectors/cluster\n",
                    1 << fmt->ff_clustshift);
 
               fatconfig12.fc_nfatsects = 0;
@@ -772,7 +772,7 @@ mkfatfs_clustersearch(FAR struct fat_format_s *fmt, FAR struct fat_var_s *var)
 
           if (mkfatfs_tryfat16(fmt, var, &fatconfig16) != 0)
             {
-              ferr("Cannot format FAT16 at %u sectors/cluster\n",
+              ferr("ERROR: Cannot format FAT16 at %u sectors/cluster\n",
                    1 << fmt->ff_clustshift);
 
               fatconfig16.fc_nfatsects = 0;
@@ -828,7 +828,7 @@ mkfatfs_clustersearch(FAR struct fat_format_s *fmt, FAR struct fat_var_s *var)
 
           if (mkfatfs_tryfat32(fmt, var, &fatconfig32) != 0)
             {
-              ferr("Cannot format FAT32 at %u sectors/cluster\n",
+              ferr("ERROR: Cannot format FAT32 at %u sectors/cluster\n",
                    1 << fmt->ff_clustshift);
 
               fatconfig32.fc_nfatsects = 0;
@@ -940,7 +940,7 @@ int mkfatfs_configfatfs(FAR struct fat_format_s *fmt,
 
       if (fmt->ff_backupboot <= 1 || fmt->ff_backupboot >= fmt->ff_rsvdseccount)
         {
-          ferr("Invalid backup boot sector: %d\n", fmt->ff_backupboot);
+          ferr("ERROR: Invalid backup boot sector: %d\n", fmt->ff_backupboot);
           fmt->ff_backupboot = 0;
         }
 
@@ -974,21 +974,21 @@ int mkfatfs_configfatfs(FAR struct fat_format_s *fmt,
   /* Describe the configured filesystem */
 
 #ifdef CONFIG_DEBUG_FEATURES
-  ferr("Sector size:          %d bytes\n",    var->fv_sectorsize);
-  ferr("Number of sectors:    %d sectors\n",  fmt->ff_nsectors);
-  ferr("FAT size:             %d bits\n",     var->fv_fattype);
-  ferr("Number FATs:          %d\n",          fmt->ff_nfats);
-  ferr("Sectors per cluster:  %d sectors\n",  1 << fmt->ff_clustshift);
-  ferr("FS size:              %d sectors\n",  var->fv_nfatsects);
-  ferr("                      %d clusters\n", var->fv_nclusters);
+  finfo("Sector size:          %d bytes\n",    var->fv_sectorsize);
+  finfo("Number of sectors:    %d sectors\n",  fmt->ff_nsectors);
+  finfo("FAT size:             %d bits\n",     var->fv_fattype);
+  finfo("Number FATs:          %d\n",          fmt->ff_nfats);
+  finfo("Sectors per cluster:  %d sectors\n",  1 << fmt->ff_clustshift);
+  finfo("FS size:              %d sectors\n",  var->fv_nfatsects);
+  finfo("                      %d clusters\n", var->fv_nclusters);
 
   if (var->fv_fattype != 32)
     {
-       ferr("Root directory slots: %d\n", fmt->ff_rootdirentries);
+       finfo("Root directory slots: %d\n", fmt->ff_rootdirentries);
     }
 
-  ferr("Volume ID:            %08x\n", fmt->ff_volumeid);
-  ferr("Volume Label:         \"%c%c%c%c%c%c%c%c%c%c%c\"\n",
+  finfo("Volume ID:            %08x\n", fmt->ff_volumeid);
+  finfo("Volume Label:         \"%c%c%c%c%c%c%c%c%c%c%c\"\n",
     fmt->ff_volumelabel[0], fmt->ff_volumelabel[1], fmt->ff_volumelabel[2],
     fmt->ff_volumelabel[3], fmt->ff_volumelabel[4], fmt->ff_volumelabel[5],
     fmt->ff_volumelabel[6], fmt->ff_volumelabel[7], fmt->ff_volumelabel[8],
diff --git a/fs/fat/fs_fat32.c b/fs/fat/fs_fat32.c
index 46ace6fd89dbcc6543df611daa1e4da5ce1dac38..618aa22e2f3dadc6a6023fdd528bde66a1cffd33 100644
--- a/fs/fat/fs_fat32.c
+++ b/fs/fat/fs_fat32.c
@@ -624,7 +624,7 @@ fat_read_restart:
 
               if (ret == -EFAULT && !force_indirect)
                 {
-                  ferr("DMA: read alignment error, restarting indirect\n");
+                  ferr("ERROR: DMA read alignment error, restarting indirect\n");
                   force_indirect = true;
                   goto fat_read_restart;
                 }
@@ -884,7 +884,7 @@ fat_write_restart:
 
               if (ret == -EFAULT && !force_indirect)
                 {
-                  ferr("DMA: write alignment error, restarting indirect\n");
+                  ferr("ERROR: DMA write alignment error, restarting indirect\n");
                   force_indirect = true;
                   goto fat_write_restart;
                 }
diff --git a/fs/fat/fs_fat32util.c b/fs/fat/fs_fat32util.c
index 1ed62cb1e7d9397b449b234c2eda7511f74660cc..a4ec2732cbc7810a995abc16762331ef416fc74a 100644
--- a/fs/fat/fs_fat32util.c
+++ b/fs/fat/fs_fat32util.c
@@ -623,7 +623,7 @@ int fat_mount(struct fat_mountpt_s *fs, bool writeable)
 
       if (i > 3)
         {
-          ferr("No valid MBR\n");
+          ferr("ERROR: No valid MBR\n");
           ret = -EINVAL;
           goto errout_with_buffer;
         }
@@ -644,22 +644,22 @@ int fat_mount(struct fat_mountpt_s *fs, bool writeable)
 
   /* We did it! */
 
-  ferr("FAT%d:\n", fs->fs_type == 0 ? 12 : fs->fs_type == 1  ? 16 : 32);
-  ferr("\tHW  sector size:     %d\n", fs->fs_hwsectorsize);
-  ferr("\t    sectors:         %d\n", fs->fs_hwnsectors);
-  ferr("\tFAT reserved:        %d\n", fs->fs_fatresvdseccount);
-  ferr("\t    sectors:         %d\n", fs->fs_fattotsec);
-  ferr("\t    start sector:    %d\n", fs->fs_fatbase);
-  ferr("\t    root sector:     %d\n", fs->fs_rootbase);
-  ferr("\t    root entries:    %d\n", fs->fs_rootentcnt);
-  ferr("\t    data sector:     %d\n", fs->fs_database);
-  ferr("\t    FSINFO sector:   %d\n", fs->fs_fsinfo);
-  ferr("\t    Num FATs:        %d\n", fs->fs_fatnumfats);
-  ferr("\t    FAT sectors:     %d\n", fs->fs_nfatsects);
-  ferr("\t    sectors/cluster: %d\n", fs->fs_fatsecperclus);
-  ferr("\t    max clusters:    %d\n", fs->fs_nclusters);
-  ferr("\tFSI free count       %d\n", fs->fs_fsifreecount);
-  ferr("\t    next free        %d\n", fs->fs_fsinextfree);
+  finfo("FAT%d:\n", fs->fs_type == 0 ? 12 : fs->fs_type == 1  ? 16 : 32);
+  finfo("\tHW  sector size:     %d\n", fs->fs_hwsectorsize);
+  finfo("\t    sectors:         %d\n", fs->fs_hwnsectors);
+  finfo("\tFAT reserved:        %d\n", fs->fs_fatresvdseccount);
+  finfo("\t    sectors:         %d\n", fs->fs_fattotsec);
+  finfo("\t    start sector:    %d\n", fs->fs_fatbase);
+  finfo("\t    root sector:     %d\n", fs->fs_rootbase);
+  finfo("\t    root entries:    %d\n", fs->fs_rootentcnt);
+  finfo("\t    data sector:     %d\n", fs->fs_database);
+  finfo("\t    FSINFO sector:   %d\n", fs->fs_fsinfo);
+  finfo("\t    Num FATs:        %d\n", fs->fs_fatnumfats);
+  finfo("\t    FAT sectors:     %d\n", fs->fs_nfatsects);
+  finfo("\t    sectors/cluster: %d\n", fs->fs_fatsecperclus);
+  finfo("\t    max clusters:    %d\n", fs->fs_nclusters);
+  finfo("\tFSI free count       %d\n", fs->fs_fsifreecount);
+  finfo("\t    next free        %d\n", fs->fs_fsinextfree);
 
   return OK;
 
diff --git a/fs/mmap/fs_mmap.c b/fs/mmap/fs_mmap.c
index 222a2591b2ddfeaecd30ce7d60b10c1073f1c628..1d8f88e7050148801bc4b25735f9736a3cbc8de7 100644
--- a/fs/mmap/fs_mmap.c
+++ b/fs/mmap/fs_mmap.c
@@ -135,14 +135,14 @@ FAR void *mmap(FAR void *start, size_t length, int prot, int flags,
   if (prot == PROT_NONE ||
       (flags & (MAP_PRIVATE | MAP_FIXED | MAP_ANONYMOUS | MAP_DENYWRITE)) != 0)
     {
-      ferr("Unsupported options, prot=%x flags=%04x\n", prot, flags);
+      ferr("ERROR: Unsupported options, prot=%x flags=%04x\n", prot, flags);
       set_errno(ENOSYS);
       return MAP_FAILED;
     }
 
   if (length == 0 || (flags & MAP_SHARED) == 0)
     {
-      ferr("Invalid options, lengt=%d flags=%04x\n", length, flags);
+      ferr("ERROR: Invalid options, lengt=%d flags=%04x\n", length, flags);
       set_errno(EINVAL);
       return MAP_FAILED;
     }
@@ -163,7 +163,7 @@ FAR void *mmap(FAR void *start, size_t length, int prot, int flags,
 #ifdef CONFIG_FS_RAMMAP
       return rammap(fd, length, offset);
 #else
-      ferr("ioctl(FIOC_MMAP) failed: %d\n", get_errno());
+      ferr("ERROR: ioctl(FIOC_MMAP) failed: %d\n", get_errno());
       return MAP_FAILED;
 #endif
     }
diff --git a/fs/mmap/fs_munmap.c b/fs/mmap/fs_munmap.c
index cf53957085de7944bb5771f2b5ac8fcbbb59525d..56737971362d223f1c8ef63c2a4037c268782ab6 100644
--- a/fs/mmap/fs_munmap.c
+++ b/fs/mmap/fs_munmap.c
@@ -143,7 +143,7 @@ int munmap(FAR void *start, size_t length)
 
   if (!curr)
     {
-      ferr("Region not found\n");
+      ferr("ERROR: Region not found\n");
       errcode = EINVAL;
       goto errout_with_semaphore;
     }
@@ -158,7 +158,7 @@ int munmap(FAR void *start, size_t length)
   offset = start - curr->addr;
   if (offset + length < curr->length)
     {
-      ferr("Cannot umap without unmapping to the end\n");
+      ferr("ERROR: Cannot umap without unmapping to the end\n");
       errcode = ENOSYS;
       goto errout_with_semaphore;
     }
diff --git a/fs/mmap/fs_rammap.c b/fs/mmap/fs_rammap.c
index 22ccd7aeea176ac5b24bee30b97448d2495ec30b..5fe71478f5cc0e730f99fab975a5ff158fde607a 100644
--- a/fs/mmap/fs_rammap.c
+++ b/fs/mmap/fs_rammap.c
@@ -142,7 +142,7 @@ FAR void *rammap(int fd, size_t length, off_t offset)
   alloc = (FAR uint8_t *)kumm_malloc(sizeof(struct fs_rammap_s) + length);
   if (!alloc)
     {
-      ferr("Region allocation failed, length: %d\n", (int)length);
+      ferr("ERROR: Region allocation failed, length: %d\n", (int)length);
       errcode = ENOMEM;
       goto errout;
     }
@@ -164,7 +164,7 @@ FAR void *rammap(int fd, size_t length, off_t offset)
        * the correct response.
        */
 
-      ferr("Seek to position %d failed\n", (int)offset);
+      ferr("ERROR: Seek to position %d failed\n", (int)offset);
       errcode = EINVAL;
       goto errout_with_region;
     }
@@ -190,7 +190,8 @@ FAR void *rammap(int fd, size_t length, off_t offset)
                * destroy the errno value.
                */
 
-              ferr("Read failed: offset=%d errno=%d\n", (int)offset, errcode);
+              ferr("ERROR: Read failed: offset=%d errno=%d\n",
+                   (int)offset, errcode);
 #ifdef CONFIG_DEBUG_FS
               goto errout_with_region;
 #else
diff --git a/fs/mount/fs_automount.c b/fs/mount/fs_automount.c
index 689e58051a47cfeac1488fd5d23af0248fcc6fec..f67f43573cb4b15a8e4b9ce8a945c7abdae850b2 100644
--- a/fs/mount/fs_automount.c
+++ b/fs/mount/fs_automount.c
@@ -204,7 +204,7 @@ static void automount_mount(FAR struct automounter_state_s *priv)
        * try to unmount again because the mount might be stale.
        */
 
-      ferr("WARNING: Mountpoint %s already exists\n", lower->mountpoint);
+      fwarn("WARNING: Mountpoint %s already exists\n", lower->mountpoint);
       ret = automount_unmount(priv);
       if (ret < 0)
         {
diff --git a/fs/nfs/nfs_util.c b/fs/nfs/nfs_util.c
index 7fa094402638e8d3bacd09b391ca3607834e05bb..e2dd949dcd24fc8779f6a115435f52e5c656cf4d 100644
--- a/fs/nfs/nfs_util.c
+++ b/fs/nfs/nfs_util.c
@@ -103,7 +103,7 @@ static inline int nfs_pathsegment(FAR const char **path, FAR char *buffer,
         }
       else if (nbytes >= NAME_MAX)
         {
-          ferr("File name segment is too long: %d\n", *path);
+          ferr("ERROR: File name segment is too long: %d\n", *path);
           return EFBIG;
         }
       else
@@ -277,7 +277,7 @@ int nfs_lookup(struct nfsmount *nmp, FAR const char *filename,
   namelen = strlen(filename);
   if (namelen > NAME_MAX)
     {
-      ferr("Length of the string is too big: %d\n", namelen);
+      ferr("ERROR: Length of the string is too long: %d\n", namelen);
       return E2BIG;
     }
 
@@ -427,7 +427,7 @@ int nfs_findnode(struct nfsmount *nmp, FAR const char *relpath,
         {
           /* The filename segment contains is too long. */
 
-          ferr("nfs_pathsegment of \"%s\" failed after \"%s\": %d\n",
+          ferr("ERROR: nfs_pathsegment of \"%s\" failed after \"%s\": %d\n",
                relpath, buffer, error);
           return error;
         }
@@ -437,7 +437,7 @@ int nfs_findnode(struct nfsmount *nmp, FAR const char *relpath,
       error = nfs_lookup(nmp, buffer, fhandle, obj_attributes, dir_attributes);
       if (error != OK)
         {
-          ferr("nfs_lookup of \"%s\" failed at \"%s\": %d\n",
+          ferr("ERROR: nfs_lookup of \"%s\" failed at \"%s\": %d\n",
                 relpath, buffer, error);
           return error;
         }
@@ -521,7 +521,7 @@ int nfs_finddir(struct nfsmount *nmp, FAR const char *relpath,
         {
           /* The filename segment contains is too long. */
 
-          ferr("nfs_pathsegment of \"%s\" failed after \"%s\": %d\n",
+          ferr("ERROR: nfs_pathsegment of \"%s\" failed after \"%s\": %d\n",
                relpath, filename, error);
           return error;
         }
@@ -545,7 +545,7 @@ int nfs_finddir(struct nfsmount *nmp, FAR const char *relpath,
       error = nfs_lookup(nmp, filename, fhandle, attributes, NULL);
       if (error != OK)
         {
-          ferr("nfs_lookup of \"%s\" failed at \"%s\": %d\n",
+          ferr("ERROR: fs_lookup of \"%s\" failed at \"%s\": %d\n",
                 relpath, filename, error);
           return error;
         }
diff --git a/fs/nfs/nfs_vfsops.c b/fs/nfs/nfs_vfsops.c
index aacc003c50615255f069388fe0a655e5f4b408d0..ecdf3ea265c9d423a1a4e01bac99ac05ce9a855f 100644
--- a/fs/nfs/nfs_vfsops.c
+++ b/fs/nfs/nfs_vfsops.c
@@ -357,7 +357,7 @@ static int nfs_filecreate(FAR struct nfsmount *nmp, struct nfsnode *np,
       tmp = *ptr;  /* handle_follows */
       if (!tmp)
         {
-          ferr("WARNING: no file attributes\n");
+          fwarn"WARNING: no file attributes\n");
         }
       else
         {
@@ -790,7 +790,7 @@ static ssize_t nfs_read(FAR struct file *filep, char *buffer, size_t buflen)
   error = nfs_checkmount(nmp);
   if (error != OK)
     {
-      ferr("nfs_checkmount failed: %d\n", error);
+      ferr("ERROR: nfs_checkmount failed: %d\n", error);
       goto errout_with_semaphore;
     }
 
@@ -966,7 +966,7 @@ static ssize_t nfs_write(FAR struct file *filep, const char *buffer,
   error = nfs_checkmount(nmp);
   if (error != OK)
     {
-      ferr("nfs_checkmount failed: %d\n", error);
+      ferr("ERROR: nfs_checkmount failed: %d\n", error);
       goto errout_with_semaphore;
     }
 
@@ -1449,7 +1449,7 @@ static int nfs_readdir(struct inode *mountpt, struct fs_dirent_s *dir)
   error = nfs_lookup(nmp, dir->fd_dir.d_name, &fhandle, &obj_attributes, NULL);
   if (error != OK)
     {
-      ferr("nfs_lookup failed: %d\n", error);
+      ferr("ERROR: nfs_lookup failed: %d\n", error);
       goto errout_with_semaphore;
     }
 
diff --git a/fs/nfs/rpc_clnt.c b/fs/nfs/rpc_clnt.c
index af163f034b2815482f4b826a23f2d6adfcae6f39..fe3a660574a4013adc00eddd11dac7f635757403 100644
--- a/fs/nfs/rpc_clnt.c
+++ b/fs/nfs/rpc_clnt.c
@@ -554,7 +554,7 @@ int rpcclnt_connect(struct rpcclnt *rpc)
   error = psock_connect(rpc->rc_so, saddr, sizeof(*saddr));
   if (error)
     {
-      ferr("psock_connect NFS port returns %d\n", error);
+      ferr("ERROR: psock_connect NFS port returns %d\n", error);
       goto bad;
     }
 
@@ -766,11 +766,11 @@ int rpcclnt_request(FAR struct rpcclnt *rpc, int procnum, int prog,
       switch (tmp)
         {
         case RPC_MISMATCH:
-          ferr("RPC_MSGDENIED: RPC_MISMATCH error\n");
+          ferr(ERROR: RPC_MSGDENIED: RPC_MISMATCH error\n");
           return EOPNOTSUPP;
 
         case RPC_AUTHERR:
-          ferr("RPC_MSGDENIED: RPC_AUTHERR error\n");
+          ferr("ERROR: RPC_MSGDENIED: RPC_AUTHERR error\n");
           return EACCES;
 
         default:
@@ -789,12 +789,12 @@ int rpcclnt_request(FAR struct rpcclnt *rpc, int procnum, int prog,
     }
   else if (tmp == RPC_PROGMISMATCH)
     {
-      ferr("RPC_MSGACCEPTED: RPC_PROGMISMATCH error\n");
+      ferr("ERROR: RPC_MSGACCEPTED: RPC_PROGMISMATCH error\n");
       return EOPNOTSUPP;
     }
   else if (tmp > 5)
     {
-      ferr("ERROR:  Other RPC type: %d\n", tmp);
+      ferr("ERROR: Unsupported RPC type: %d\n", tmp);
       return EOPNOTSUPP;
     }
 
diff --git a/fs/nxffs/nxffs_blockstats.c b/fs/nxffs/nxffs_blockstats.c
index 8ba53dec12537c69b0a3ba789bbe39b51ef95048..d1c3b8fb8de950542be628ee46667a93bfe860b2 100644
--- a/fs/nxffs/nxffs_blockstats.c
+++ b/fs/nxffs/nxffs_blockstats.c
@@ -147,11 +147,11 @@ int nxffs_blockstats(FAR struct nxffs_volume_s *volume,
         }
     }
 
-  ferr("Number blocks:        %d\n", stats->nblocks);
-  ferr("  Good blocks:        %d\n", stats->ngood);
-  ferr("  Bad blocks:         %d\n", stats->nbad);
-  ferr("  Unformatted blocks: %d\n", stats->nunformat);
-  ferr("  Corrupt blocks:     %d\n", stats->ncorrupt);
+  finfo("Number blocks:        %d\n", stats->nblocks);
+  finfo("  Good blocks:        %d\n", stats->ngood);
+  finfo("  Bad blocks:         %d\n", stats->nbad);
+  finfo("  Unformatted blocks: %d\n", stats->nunformat);
+  finfo("  Corrupt blocks:     %d\n", stats->ncorrupt);
 
 #else
   for (ioblock = 0; ioblock < volume->nblocks; ioblock++)
@@ -221,12 +221,12 @@ int nxffs_blockstats(FAR struct nxffs_volume_s *volume,
         }
     }
 
-  ferr("Number blocks:        %d\n", stats->nblocks);
-  ferr("  Good blocks:        %d\n", stats->ngood);
-  ferr("  Bad blocks:         %d\n", stats->nbad);
-  ferr("  Unformatted blocks: %d\n", stats->nunformat);
-  ferr("  Corrupt blocks:     %d\n", stats->ncorrupt);
-  ferr("  Unreadable blocks:  %d\n", stats->nbadread);
+  finfo("Number blocks:        %d\n", stats->nblocks);
+  finfo("  Good blocks:        %d\n", stats->ngood);
+  finfo("  Bad blocks:         %d\n", stats->nbad);
+  finfo("  Unformatted blocks: %d\n", stats->nunformat);
+  finfo("  Corrupt blocks:     %d\n", stats->ncorrupt);
+  finfo("  Unreadable blocks:  %d\n", stats->nbadread);
 
 #endif
   return OK;
diff --git a/fs/nxffs/nxffs_initialize.c b/fs/nxffs/nxffs_initialize.c
index 217f0963f9f0224232c38815b8588af87d715cea..8b99252bba625a87da1909155d746d6614a4d427 100644
--- a/fs/nxffs/nxffs_initialize.c
+++ b/fs/nxffs/nxffs_initialize.c
@@ -274,7 +274,7 @@ int nxffs_initialize(FAR struct mtd_dev_s *mtd)
 
   /* We may need to format the volume.  Try that before giving up. */
 
-  ferr("WARNING: Failed to calculate file system limits: %d\n", -ret);
+  fwarn("WARNING: Failed to calculate file system limits: %d\n", -ret);
   ret = nxffs_reformat(volume);
   if (ret < 0)
     {
diff --git a/fs/romfs/fs_romfs.c b/fs/romfs/fs_romfs.c
index b90b87101b4667e8278e31fa06ddb98e606d23c8..92584422e9f9909e3f878893548a278f16630593 100644
--- a/fs/romfs/fs_romfs.c
+++ b/fs/romfs/fs_romfs.c
@@ -169,7 +169,7 @@ static int romfs_open(FAR struct file *filep, FAR const char *relpath,
   ret = romfs_checkmount(rm);
   if (ret != OK)
     {
-      ferr("romfs_checkmount failed: %d\n", ret);
+      ferr("ERROR: romfs_checkmount failed: %d\n", ret);
       goto errout_with_semaphore;
     }
 
@@ -179,7 +179,7 @@ static int romfs_open(FAR struct file *filep, FAR const char *relpath,
 
   if ((oflags & O_WRONLY) != 0 || (oflags & O_RDONLY) == 0)
     {
-      ferr("Only O_RDONLY supported\n");
+      ferr("ERROR: Only O_RDONLY supported\n");
       ret = -EACCES;
       goto errout_with_semaphore;
     }
@@ -193,7 +193,7 @@ static int romfs_open(FAR struct file *filep, FAR const char *relpath,
   ret = romfs_finddirentry(rm, &dirinfo, relpath);
   if (ret < 0)
     {
-      ferr("Failed to find directory directory entry for '%s': %d\n",
+      ferr("ERROR: Failed to find directory directory entry for '%s': %d\n",
            relpath, ret);
       goto errout_with_semaphore;
     }
@@ -207,7 +207,7 @@ static int romfs_open(FAR struct file *filep, FAR const char *relpath,
       /* It is a directory */
 
       ret = -EISDIR;
-      ferr("'%s' is a directory\n", relpath);
+      ferr("ERROR: '%s' is a directory\n", relpath);
       goto errout_with_semaphore;
     }
 
@@ -222,7 +222,7 @@ static int romfs_open(FAR struct file *filep, FAR const char *relpath,
   rf = (FAR struct romfs_file_s *)kmm_zalloc(sizeof(struct romfs_file_s));
   if (!rf)
     {
-      ferr("Failed to allocate private data\n", ret);
+      ferr("ERROR: Failed to allocate private data\n", ret);
       ret = -ENOMEM;
       goto errout_with_semaphore;
     }
@@ -239,7 +239,7 @@ static int romfs_open(FAR struct file *filep, FAR const char *relpath,
                         &rf->rf_startoffset);
   if (ret < 0)
     {
-      ferr("Failed to locate start of file data: %d\n", ret);
+      ferr("ERROR: Failed to locate start of file data: %d\n", ret);
       goto errout_with_semaphore;
     }
 
@@ -248,7 +248,7 @@ static int romfs_open(FAR struct file *filep, FAR const char *relpath,
   ret = romfs_fileconfigure(rm, rf);
   if (ret < 0)
     {
-      ferr("Failed configure buffering: %d\n", ret);
+      ferr("ERROR: Failed configure buffering: %d\n", ret);
       goto errout_with_semaphore;
     }
 
@@ -359,7 +359,7 @@ static ssize_t romfs_read(FAR struct file *filep, FAR char *buffer,
   ret = romfs_checkmount(rm);
   if (ret != OK)
     {
-      ferr("romfs_checkmount failed: %d\n", ret);
+      ferr("ERROR: romfs_checkmount failed: %d\n", ret);
       goto errout_with_semaphore;
     }
 
@@ -408,7 +408,7 @@ static ssize_t romfs_read(FAR struct file *filep, FAR char *buffer,
           ret = romfs_hwread(rm, userbuffer, sector, nsectors);
           if (ret < 0)
             {
-              ferr("romfs_hwread failed: %d\n", ret);
+              ferr("ERROR: romfs_hwread failed: %d\n", ret);
               goto errout_with_semaphore;
             }
 
@@ -426,7 +426,7 @@ static ssize_t romfs_read(FAR struct file *filep, FAR char *buffer,
           ret = romfs_filecacheread(rm, rf, sector);
           if (ret < 0)
             {
-              ferr("romfs_filecacheread failed: %d\n", ret);
+              ferr("ERROR: romfs_filecacheread failed: %d\n", ret);
               goto errout_with_semaphore;
             }
 
@@ -511,7 +511,7 @@ static off_t romfs_seek(FAR struct file *filep, off_t offset, int whence)
         break;
 
     default:
-        ferr("Whence is invalid: %d\n", whence);
+        ferr("ERROR: Whence is invalid: %d\n", whence);
         return -EINVAL;
     }
 
@@ -521,7 +521,7 @@ static off_t romfs_seek(FAR struct file *filep, off_t offset, int whence)
   ret = romfs_checkmount(rm);
   if (ret != OK)
     {
-       ferr("romfs_checkmount failed: %d\n", ret);
+       ferr("ERROR: romfs_checkmount failed: %d\n", ret);
        goto errout_with_semaphore;
     }
 
@@ -582,7 +582,7 @@ static int romfs_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
       return OK;
     }
 
-  ferr("Invalid cmd: %d \n", cmd);
+  ferr("ERROR: Invalid cmd: %d \n", cmd);
   return -ENOTTY;
 }
 
@@ -618,7 +618,7 @@ static int romfs_dup(FAR const struct file *oldp, FAR struct file *newp)
   ret = romfs_checkmount(rm);
   if (ret != OK)
     {
-      ferr("romfs_checkmount failed: %d\n", ret);
+      ferr("ERROR: romfs_checkmount failed: %d\n", ret);
       goto errout_with_semaphore;
     }
 
@@ -633,7 +633,7 @@ static int romfs_dup(FAR const struct file *oldp, FAR struct file *newp)
   newrf = (FAR struct romfs_file_s *)kmm_malloc(sizeof(struct romfs_file_s));
   if (!newrf)
     {
-      ferr("Failed to allocate private data\n", ret);
+      ferr("ERROR: Failed to allocate private data\n", ret);
       ret = -ENOMEM;
       goto errout_with_semaphore;
     }
@@ -649,7 +649,7 @@ static int romfs_dup(FAR const struct file *oldp, FAR struct file *newp)
   if (ret < 0)
     {
       kmm_free(newrf);
-      ferr("Failed configure buffering: %d\n", ret);
+      ferr("ERROR: Failed configure buffering: %d\n", ret);
       goto errout_with_semaphore;
     }
 
@@ -707,7 +707,7 @@ static int romfs_opendir(FAR struct inode *mountpt, FAR const char *relpath,
   ret = romfs_checkmount(rm);
   if (ret != OK)
     {
-      ferr("romfs_checkmount failed: %d\n", ret);
+      ferr("ERROR: romfs_checkmount failed: %d\n", ret);
       goto errout_with_semaphore;
     }
 
@@ -716,7 +716,7 @@ static int romfs_opendir(FAR struct inode *mountpt, FAR const char *relpath,
   ret = romfs_finddirentry(rm, &dirinfo, relpath);
   if (ret < 0)
     {
-      ferr("Failed to find directory '%s': %d\n", relpath, ret);
+      ferr("ERROR: Failed to find directory '%s': %d\n", relpath, ret);
       goto errout_with_semaphore;
     }
 
@@ -726,7 +726,7 @@ static int romfs_opendir(FAR struct inode *mountpt, FAR const char *relpath,
     {
       /* The entry is not a directory */
 
-      ferr("'%s' is not a directory: %d\n", relpath);
+      ferr("ERROR: '%s' is not a directory: %d\n", relpath);
       ret = -ENOTDIR;
       goto errout_with_semaphore;
     }
@@ -775,7 +775,7 @@ static int romfs_readdir(FAR struct inode *mountpt,
   ret = romfs_checkmount(rm);
   if (ret != OK)
     {
-      ferr("romfs_checkmount failed: %d\n", ret);
+      ferr("ERROR: omfs_checkmount failed: %d\n", ret);
       goto errout_with_semaphore;
     }
 
@@ -791,7 +791,7 @@ static int romfs_readdir(FAR struct inode *mountpt,
            * special error -ENOENT
            */
 
-          ferr("End of directory\n");
+          finfo("End of directory\n");
           ret = -ENOENT;
           goto errout_with_semaphore;
         }
@@ -802,7 +802,7 @@ static int romfs_readdir(FAR struct inode *mountpt,
                                 &next, &info, &size);
       if (ret < 0)
         {
-          ferr("romfs_parsedirentry failed: %d\n", ret);
+          ferr("ERROR: romfs_parsedirentry failed: %d\n", ret);
           goto errout_with_semaphore;
         }
 
@@ -811,7 +811,7 @@ static int romfs_readdir(FAR struct inode *mountpt,
       ret = romfs_parsefilename(rm, dir->u.romfs.fr_curroffset, dir->fd_dir.d_name);
       if (ret < 0)
         {
-          ferr("romfs_parsefilename failed: %d\n", ret);
+          ferr("ERROR: romfs_parsefilename failed: %d\n", ret);
           goto errout_with_semaphore;
         }
 
@@ -897,14 +897,14 @@ static int romfs_bind(FAR struct inode *blkdriver, FAR const void *data,
 
   if (!blkdriver || !blkdriver->u.i_bops)
     {
-      ferr("No block driver/ops\n");
+      ferr("ERROR: No block driver/ops\n");
       return -ENODEV;
     }
 
   if (blkdriver->u.i_bops->open &&
       blkdriver->u.i_bops->open(blkdriver) != OK)
     {
-      ferr("No open method\n");
+      ferr("ERROR: No open method\n");
       return -ENODEV;
     }
 
@@ -913,7 +913,7 @@ static int romfs_bind(FAR struct inode *blkdriver, FAR const void *data,
   rm = (FAR struct romfs_mountpt_s *)kmm_zalloc(sizeof(struct romfs_mountpt_s));
   if (!rm)
     {
-      ferr("Failed to allocate mountpoint structure\n");
+      ferr("ERROR: Failed to allocate mountpoint structure\n");
       return -ENOMEM;
     }
 
@@ -930,7 +930,7 @@ static int romfs_bind(FAR struct inode *blkdriver, FAR const void *data,
   ret = romfs_hwconfigure(rm);
   if (ret < 0)
     {
-      ferr("romfs_hwconfigure failed: %d\n", ret);
+      ferr("ERROR: romfs_hwconfigure failed: %d\n", ret);
       goto errout_with_sem;
     }
 
@@ -941,7 +941,7 @@ static int romfs_bind(FAR struct inode *blkdriver, FAR const void *data,
   ret = romfs_fsconfigure(rm);
   if (ret < 0)
     {
-      ferr("romfs_fsconfigure failed: %d\n", ret);
+      ferr("ERROR: romfs_fsconfigure failed: %d\n", ret);
       goto errout_with_buffer;
     }
 
@@ -993,7 +993,7 @@ static int romfs_unbind(FAR void *handle, FAR struct inode **blkdriver,
     {
       /* We cannot unmount now.. there are open files */
 
-      ferr("There are open files\n");
+      fwarn("WARNING: There are open files\n");
 
       /* This implementation currently only supports unmounting if there are
        * no open file references.
@@ -1072,7 +1072,7 @@ static int romfs_statfs(FAR struct inode *mountpt, FAR struct statfs *buf)
   ret = romfs_checkmount(rm);
   if (ret < 0)
     {
-      ferr("romfs_checkmount failed: %d\n", ret);
+      ferr("ERROR: romfs_checkmount failed: %d\n", ret);
       goto errout_with_semaphore;
     }
 
@@ -1130,7 +1130,7 @@ static int romfs_stat(FAR struct inode *mountpt, FAR const char *relpath,
   ret = romfs_checkmount(rm);
   if (ret != OK)
     {
-      ferr("romfs_checkmount failed: %d\n", ret);
+      ferr("ERROR: romfs_checkmount failed: %d\n", ret);
       goto errout_with_semaphore;
     }
 
diff --git a/fs/romfs/fs_romfsutil.c b/fs/romfs/fs_romfsutil.c
index b39f3e866f4abc64bcfcfaca2584b82ccb5cee8b..50bf56ddc285a8a2df9620e4b6631727a84a84dc 100644
--- a/fs/romfs/fs_romfsutil.c
+++ b/fs/romfs/fs_romfsutil.c
@@ -467,7 +467,7 @@ int romfs_filecacheread(struct romfs_mountpt_s *rm, struct romfs_file_s *rf,
           ret = romfs_hwread(rm, rf->rf_buffer, sector, 1);
           if (ret < 0)
             {
-              ferr("romfs_hwread failed: %d\n", ret);
+              ferr("ERROR: romfs_hwread failed: %d\n", ret);
               return ret;
             }
         }
diff --git a/fs/smartfs/smartfs_smart.c b/fs/smartfs/smartfs_smart.c
index eeae9d6ccf297e98d8ab9ff26a9f0a717e0c5ef0..c276eeff30ea017595d09f17742caa0401054433 100644
--- a/fs/smartfs/smartfs_smart.c
+++ b/fs/smartfs/smartfs_smart.c
@@ -505,7 +505,8 @@ static ssize_t smartfs_read(FAR struct file *filep, char *buffer, size_t buflen)
       ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
       if (ret < 0)
         {
-          ferr("Error %d reading sector %d data\n", ret, sf->currsector);
+          ferr("ERROR: Error %d reading sector %d data\n",
+               ret, sf->currsector);
           goto errout_with_semaphore;
         }
 
@@ -614,7 +615,8 @@ static int smartfs_sync_internal(struct smartfs_mountpt_s *fs,
       ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
       if (ret < 0)
         {
-          ferr("Error %d writing used bytes for sector %d\n", ret, sf->currsector);
+          ferr("ERROR: Error %d writing used bytes for sector %d\n",
+               ret, sf->currsector);
           goto errout;
         }
 
@@ -639,7 +641,8 @@ static int smartfs_sync_internal(struct smartfs_mountpt_s *fs,
       ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
       if (ret < 0)
         {
-          ferr("Error %d reading sector %d data\n", ret, sf->currsector);
+          ferr("ERROR: Error %d reading sector %d data\n",
+               ret, sf->currsector);
           goto errout;
         }
 
@@ -661,7 +664,8 @@ static int smartfs_sync_internal(struct smartfs_mountpt_s *fs,
       ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
       if (ret < 0)
         {
-          ferr("Error %d writing used bytes for sector %d\n", ret, sf->currsector);
+          ferr("ERROR: Error %d writing used bytes for sector %d\n",
+               ret, sf->currsector);
           goto errout;
         }
 
@@ -766,7 +770,8 @@ static ssize_t smartfs_write(FAR struct file *filep, const char *buffer,
           ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
           if (ret < 0)
             {
-              ferr("Error %d writing sector %d data\n", ret, sf->currsector);
+              ferr("ERROR: Error %d writing sector %d data\n", 
+                   et, sf->currsector);
               goto errout_with_semaphore;
             }
 
@@ -793,7 +798,8 @@ static ssize_t smartfs_write(FAR struct file *filep, const char *buffer,
           ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
           if (ret < 0)
             {
-              ferr("Error %d reading sector %d header\n", ret, sf->currsector);
+              ferr("ERROR: Error %d reading sector %d header\n",
+                   ret, sf->currsector);
               goto errout_with_semaphore;
             }
 
@@ -841,7 +847,8 @@ static ssize_t smartfs_write(FAR struct file *filep, const char *buffer,
           ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
           if (ret < 0)
             {
-              ferr("Error %d writing sector %d data\n", ret, sf->currsector);
+              ferr("ERROR: Error %d writing sector %d data\n",
+                   ret, sf->currsector);
               goto errout_with_semaphore;
             }
         }
@@ -867,7 +874,7 @@ static ssize_t smartfs_write(FAR struct file *filep, const char *buffer,
           ret = FS_IOCTL(fs, BIOC_ALLOCSECT, 0xFFFF);
           if (ret < 0)
             {
-              ferr("Error %d allocating new sector\n", ret);
+              ferr("ERROR: Error %d allocating new sector\n", ret);
               goto errout_with_semaphore;
             }
 
@@ -892,7 +899,7 @@ static ssize_t smartfs_write(FAR struct file *filep, const char *buffer,
             {
               /* Error allocating logical sector! */
 
-              ferr("Error - duplicate logical sector %d\n", sf->currsector);
+              ferr("ERROR: Duplicate logical sector %d\n", sf->currsector);
             }
 
           sf->bflags = SMARTFS_BFLAG_DIRTY;
@@ -922,7 +929,7 @@ static ssize_t smartfs_write(FAR struct file *filep, const char *buffer,
               ret = FS_IOCTL(fs, BIOC_ALLOCSECT, 0xFFFF);
               if (ret < 0)
                 {
-                  ferr("Error %d allocating new sector\n", ret);
+                  ferr("ERROR: Error %d allocating new sector\n", ret);
                   goto errout_with_semaphore;
                 }
 
@@ -937,7 +944,7 @@ static ssize_t smartfs_write(FAR struct file *filep, const char *buffer,
               ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
               if (ret < 0)
                 {
-                  ferr("Error %d writing next sector\n", ret);
+                  ferr("ERROR: Error %d writing next sector\n", ret);
                   goto errout_with_semaphore;
                 }
 
@@ -949,7 +956,7 @@ static ssize_t smartfs_write(FAR struct file *filep, const char *buffer,
                 {
                   /* Error allocating logical sector! */
 
-                  ferr("Error - duplicate logical sector %d\n", sf->currsector);
+                  ferr("ERROR: Duplicate logical sector %d\n", sf->currsector);
                 }
 
               sf->currsector = SMARTFS_NEXTSECTOR(header);
@@ -1078,7 +1085,8 @@ static off_t smartfs_seek_internal(struct smartfs_mountpt_s *fs,
       ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
       if (ret < 0)
         {
-          ferr("Error %d reading sector %d header\n", ret, sf->currsector);
+          ferr("ERROR: Error %d reading sector %d header\n",
+               ret, sf->currsector);
           goto errout;
         }
 
@@ -1103,7 +1111,8 @@ static off_t smartfs_seek_internal(struct smartfs_mountpt_s *fs,
       ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
       if (ret < 0)
         {
-          ferr("Error %d reading sector %d header\n", ret, sf->currsector);
+          ferr("ERROR: Error %d reading sector %d header\n",
+               ret, sf->currsector);
           goto errout;
         }
     }
@@ -1933,7 +1942,8 @@ int smartfs_rename(struct inode *mountpt, const char *oldrelpath,
           ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
           if (ret < 0)
             {
-              ferr("Error %d reading sector %d data\n", ret, oldentry.dsector);
+              ferr("ERROR: Error %d reading sector %d data\n",
+                   ret, oldentry.dsector);
               goto errout_with_semaphore;
             }
 
@@ -2005,7 +2015,8 @@ int smartfs_rename(struct inode *mountpt, const char *oldrelpath,
       ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
       if (ret < 0)
         {
-          ferr("Error %d reading sector %d data\n", ret, oldentry.dsector);
+          ferr("ERROR: Error %d reading sector %d data\n",
+               ret, oldentry.dsector);
           goto errout_with_semaphore;
         }
 
@@ -2024,7 +2035,8 @@ int smartfs_rename(struct inode *mountpt, const char *oldrelpath,
       ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
       if (ret < 0)
         {
-          ferr("Error %d writing flag bytes for sector %d\n", ret, readwrite.logsector);
+          ferr("ERROR: Error %d writing flag bytes for sector %d\n",
+               ret, readwrite.logsector);
           goto errout_with_semaphore;
         }
     }
diff --git a/fs/smartfs/smartfs_utils.c b/fs/smartfs/smartfs_utils.c
index 6c8373e79f4610053289c9971be544e734665da1..44efc60c26eb40cc2b135070c5a2bdba53e07b5e 100644
--- a/fs/smartfs/smartfs_utils.c
+++ b/fs/smartfs/smartfs_utils.c
@@ -231,7 +231,7 @@ int smartfs_mount(struct smartfs_mountpt_s *fs, bool writeable)
   ret = FS_IOCTL(fs, BIOC_GETFORMAT, (unsigned long) &fs->fs_llformat);
   if (ret != OK)
     {
-      ferr("Error getting device low level format: %d\n", ret);
+      ferr("ERROR: Error getting device low level format: %d\n", ret);
       goto errout;
     }
 
@@ -239,7 +239,7 @@ int smartfs_mount(struct smartfs_mountpt_s *fs, bool writeable)
 
   if (!(fs->fs_llformat.flags & SMART_FMT_ISFORMATTED))
     {
-      ferr("No low-level format found\n");
+      ferr("ERROR: No low-level format found\n");
       ret = -ENODEV;
       goto errout;
     }
@@ -311,16 +311,16 @@ int smartfs_mount(struct smartfs_mountpt_s *fs, bool writeable)
 
   fs->fs_mounted = TRUE;
 
-  ferr("SMARTFS:\n");
-  ferr("\t    Sector size:     %d\n", fs->fs_llformat.sectorsize);
-  ferr("\t    Bytes/sector     %d\n", fs->fs_llformat.availbytes);
-  ferr("\t    Num sectors:     %d\n", fs->fs_llformat.nsectors);
-  ferr("\t    Free sectors:    %d\n", fs->fs_llformat.nfreesectors);
-  ferr("\t    Max filename:    %d\n", CONFIG_SMARTFS_MAXNAMLEN);
+  finfo("SMARTFS:\n");
+  finfo("\t    Sector size:     %d\n", fs->fs_llformat.sectorsize);
+  finfo("\t    Bytes/sector     %d\n", fs->fs_llformat.availbytes);
+  finfo("\t    Num sectors:     %d\n", fs->fs_llformat.nsectors);
+  finfo("\t    Free sectors:    %d\n", fs->fs_llformat.nfreesectors);
+  finfo("\t    Max filename:    %d\n", CONFIG_SMARTFS_MAXNAMLEN);
 #ifdef CONFIG_SMARTFS_MULTI_ROOT_DIRS
-  ferr("\t    RootDirEntries:  %d\n", fs->fs_llformat.nrootdirentries);
+  finfo("\t    RootDirEntries:  %d\n", fs->fs_llformat.nrootdirentries);
 #endif
-  ferr("\t    RootDirSector:   %d\n", fs->fs_rootsector);
+  finfo("\t    RootDirSector:   %d\n", fs->fs_rootsector);
 
 errout:
   return ret;
@@ -695,10 +695,12 @@ int smartfs_finddirentry(struct smartfs_mountpt_s *fs,
                                   /* Read the next sector of the file */
 
                                   readwrite.logsector = dirsector;
-                                  ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
+                                  ret = FS_IOCTL(fs, BIOC_READSECT,
+                                                 (unsigned long) &readwrite);
                                   if (ret < 0)
                                     {
-                                      ferr("Error in sector chain at %d!\n", dirsector);
+                                      ferr("ERROR: Error in sector chain at %d!\n",
+                                           dirsector);
                                       break;
                                     }
 
@@ -937,7 +939,7 @@ int smartfs_createentry(FAR struct smartfs_mountpt_s *fs,
           ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
           if (ret < 0)
             {
-              ferr("Error chaining sector %d\n", nextsector);
+              ferr("ERROR: Error chaining sector %d\n", nextsector);
               goto errout;
             }
         }
@@ -1014,7 +1016,7 @@ int smartfs_createentry(FAR struct smartfs_mountpt_s *fs,
           ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
           if (ret < 0)
             {
-              ferr("Error %d setting new sector type for sector %d\n",
+              ferr("ERROR: Error %d setting new sector type for sector %d\n",
                    ret, nextsector);
               goto errout;
             }
@@ -1129,7 +1131,7 @@ int smartfs_deleteentry(struct smartfs_mountpt_s *fs,
       ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
       if (ret < 0)
         {
-          ferr("Error reading sector %d\n", nextsector);
+          ferr("ERROR: Error reading sector %d\n", nextsector);
           break;
         }
 
@@ -1148,7 +1150,8 @@ int smartfs_deleteentry(struct smartfs_mountpt_s *fs,
   ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
   if (ret < 0)
     {
-      ferr("Error reading directory info at sector %d\n", entry->dsector);
+      ferr("ERROR: Error reading directory info at sector %d\n",
+           entry->dsector);
       goto errout;
     }
 
@@ -1177,7 +1180,8 @@ int smartfs_deleteentry(struct smartfs_mountpt_s *fs,
   ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
   if (ret < 0)
     {
-      ferr("Error marking entry inactive at sector %d\n", entry->dsector);
+      ferr("ERROR: Error marking entry inactive at sector %d\n",
+           entry->dsector);
       goto errout;
     }
 
@@ -1242,7 +1246,7 @@ int smartfs_deleteentry(struct smartfs_mountpt_s *fs,
               ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
               if (ret < 0)
                 {
-                  ferr("Error reading sector %d\n", nextsector);
+                  ferr("ERROR: Error reading sector %d\n", nextsector);
                   break;
                 }
 
@@ -1259,7 +1263,7 @@ int smartfs_deleteentry(struct smartfs_mountpt_s *fs,
                   ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
                   if (ret < 0)
                     {
-                      ferr("Error unchaining sector (%d)\n", nextsector);
+                      ferr("ERROR: Error unchaining sector (%d)\n", nextsector);
                       goto errout;
                     }
 
@@ -1268,7 +1272,7 @@ int smartfs_deleteentry(struct smartfs_mountpt_s *fs,
                   ret = FS_IOCTL(fs, BIOC_FREESECT, (unsigned long) entry->dsector);
                   if (ret < 0)
                     {
-                      ferr("Error freeing sector %d\n", entry->dsector);
+                      ferr("ERROR: Error freeing sector %d\n", entry->dsector);
                       goto errout;
                     }
 
@@ -1327,7 +1331,7 @@ int smartfs_countdirentries(struct smartfs_mountpt_s *fs,
       ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
       if (ret < 0)
         {
-          ferr("Error reading sector %d\n", nextsector);
+          ferr("ERROR: Error reading sector %d\n", nextsector);
           break;
         }
 
@@ -1336,7 +1340,7 @@ int smartfs_countdirentries(struct smartfs_mountpt_s *fs,
       header = (struct smartfs_chain_header_s *) fs->fs_rwbuffer;
       if (header->type != SMARTFS_SECTOR_TYPE_DIR)
         {
-          ferr("Sector %d is not a DIR sector!\n", nextsector);
+          ferr("ERROR: Sector %d is not a DIR sector!\n", nextsector);
           goto errout;
         }
 
@@ -1411,7 +1415,7 @@ int smartfs_truncatefile(struct smartfs_mountpt_s *fs,
       ret = FS_IOCTL(fs, BIOC_READSECT, (unsigned long) &readwrite);
       if (ret < 0)
         {
-          ferr("Error reading sector %d header\n", nextsector);
+          ferr("ERROR: Error reading sector %d header\n", nextsector);
           goto errout;
         }
 
@@ -1447,7 +1451,7 @@ int smartfs_truncatefile(struct smartfs_mountpt_s *fs,
           ret = FS_IOCTL(fs, BIOC_WRITESECT, (unsigned long) &readwrite);
           if (ret < 0)
             {
-              ferr("Error blanking 1st sector (%d) of file\n", nextsector);
+              ferr("ERROR: Error blanking 1st sector (%d) of file\n", nextsector);
               goto errout;
             }
 
@@ -1463,7 +1467,7 @@ int smartfs_truncatefile(struct smartfs_mountpt_s *fs,
           ret = FS_IOCTL(fs, BIOC_FREESECT, (unsigned long) nextsector);
           if (ret < 0)
             {
-              ferr("Error freeing sector %d\n", nextsector);
+              ferr("ERROR: Error freeing sector %d\n", nextsector);
               goto errout;
             }
         }
diff --git a/fs/tmpfs/fs_tmpfs.c b/fs/tmpfs/fs_tmpfs.c
index a44ddb11ffbb35e3eb07aa1fe8ba6b424d5f5844..ee56d7189b536566ff5ce557a54b0a9ba5ce393a 100644
--- a/fs/tmpfs/fs_tmpfs.c
+++ b/fs/tmpfs/fs_tmpfs.c
@@ -1727,7 +1727,7 @@ static int tmpfs_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
       return OK;
     }
 
-  ferr("Invalid cmd: %d\n", cmd);
+  ferr("ERROR: Invalid cmd: %d\n", cmd);
   return -ENOTTY;
 }
 
diff --git a/fs/vfs/fs_epoll.c b/fs/vfs/fs_epoll.c
index bc0502e111a471e0e877c06fec5f376793fc2454..47500d01f323b37d40f0e7ed28b5fcb93e5c6fa7 100644
--- a/fs/vfs/fs_epoll.c
+++ b/fs/vfs/fs_epoll.c
@@ -190,12 +190,12 @@ int epoll_wait(int epfd, FAR struct epoll_event *evs, int maxevents,
     {
       if (rc < 0)
         {
-          ferr("%08x poll fail: %d for %d, %d msecs\n",
+          ferr("ERROR: %08x poll fail: %d for %d, %d msecs\n",
                epfd, rc, eph->occupied, timeout);
 
           for (i = 0; i < eph->occupied; i++)
             {
-              ferr("%02d: fd=%d\n", i, eph->evs[i].data.fd);
+              ferr("  %02d: fd=%d\n", i, eph->evs[i].data.fd);
             }
         }