On Aug 20, 2012, at 23.02.45, Theodore Ts'o [off-list ref] wrote:

Yes, you should definitely get a newer version of e2fsprogs.  The
latest version is 1.42.5.

Done.

As to whether you'll need to recreate the filesystem, I'll need to see
the output of dumpe2fs -h.  It may be that file system was created in
sufficiently poor configuration that it would be highly advisable that
you recreate the file system.

Thanks for the reply. Below, as requested, the output from dumpe2fs and the mke2fs.conf file (Ubuntu 12.04). I look forward to hearing that my file system isn't in a state of "sufficiently poor configuration"; however, since I originally posted my question I've managed to secure a means to duplicate the data so that I can recreate the file system (if necessary).

Thanks a lot for your help.



dumpe2fs 1.42.5 (29-Jul-2012)
Filesystem volume name:   <none>
Last mounted on:          /media/Bigger
Filesystem UUID:          baecfa03-74c1-42ad-8e19-3b823f05f502
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr dir_index filetype extent 64bit flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize
Filesystem flags:         signed_directory_hash 
Default mount options:    user_xattr acl
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              274700288
Block count:              4395202560
Reserved block count:     219760128
Free blocks:              247712956
Free inodes:              274636266
First block:              0
Block size:               4096
Fragment size:            4096
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         2048
Inode blocks per group:   128
RAID stride:              128
RAID stripe width:        768
Flex block group size:    16
Filesystem created:       Fri Aug 17 02:54:50 2012
Last mount time:          Mon Aug 20 02:21:51 2012
Last write time:          Mon Aug 20 12:28:57 2012
Mount count:              0
Maximum mount count:      -1
Last checked:             Mon Aug 20 12:28:57 2012
Check interval:           0 (<none>)
Lifetime writes:          16 TB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:	          256
Required extra isize:     28
Desired extra isize:      28
Journal inode:            8
Default directory hash:   half_md4
Directory Hash Seed:      b357ba49-60b1-4c55-837f-a70c8285a8f5
Journal backup:           inode blocks
Journal features:         journal_incompat_revoke journal_64bit
Journal size:             128M
Journal length:           32768
Journal sequence:         0x00009b36
Journal start:            0



[defaults]
	base_features = sparse_super,filetype,resize_inode,dir_index,ext_attr
	default_mntopts = acl,user_xattr
	enable_periodic_fsck = 0
	blocksize = 4096
	inode_size = 256
	inode_ratio = 16384

[fs_types]
	ext3 = {
		features = has_journal
	}
	ext4 = {
		features = has_journal,extent,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize
		auto_64-bit_support = 1
		inode_size = 256
	}
	ext4dev = {
		features = has_journal,extent,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize
		inode_size = 256
		options = test_fs=1
	}
	small = {
		blocksize = 1024
		inode_size = 128
		inode_ratio = 4096
	}
	floppy = {
		blocksize = 1024
		inode_size = 128
		inode_ratio = 8192
	}
	big = {
		inode_ratio = 32768
	}
	huge = {
		inode_ratio = 65536
	}
	news = {
		inode_ratio = 4096
	}
	largefile = {
		inode_ratio = 1048576
		blocksize = -1
	}
	largefile4 = {
		inode_ratio = 4194304
		blocksize = -1
	}
	hurd = {
	     blocksize = 4096
	     inode_size = 128
	}

--
Curtis Jones