SUMMARY
We are getting many ``Free blocks count wrong for group'' errors when
running e2fsck on a 245-GB ext3 filesystem. This is when the file
system is cleanly unmounted on a relatively quiet system to do a
resize. From reading other messages here, my suspicion is that this
is because we have e2fsprogs 1.32.
Questions:
* Should we use e2fsck/e2fsprogs 1.36 and will that probably address this
problem?
* Is e2fsprogs 1.36 compatible with EXT3 2.4-0.9.19 on RHEL3?
DETAILS
Kernel: Linux ****** 2.4.21-37.0.1.ELsmp #1 SMP Wed
Jan 11 18:44:17 EST 2006 i686 i686 i386 GNU/Linux
FS: EXT3 FS 2.4-0.9.19, 19 August 2002 on sd(8,1), internal journal
----------------------------------------------------------------------
dumpe2fs 1.32 (09-Nov-2002)
...
Filesystem revision #: 1 (dynamic)
Filesystem features: has_journal dir_index filetype
needs_recovery sparse_super
----------------------------------------------------------------------
As far as I can tell every group is enumerated in the e2fsck output
(see below). We've unmounted, run e2fsck and extended the filesystem
several times and we saw these errors every time. Each time we ran
e2fsck on the fs.
This filesystem stores email for the Cyrus IMAP software. However,
user trees of sometimes large Berkeley mbox files are copied to this
filesystem, converted to Cyrus message files, then deleted. So large
collections of large files are created and deleted in a rather short
period of time.
The mounted device is an LVM logical volume and the back end storage is
EMC.
Thanks.
Ken Guyton
Emory University
Output of e2fsck:
----------------------------------------------------------------------
e2fsck 1.32 (09-Nov-2002)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 3A: Optimizing directories
Optimizing directories: 163843 196610 491522 589826 688143 720898...
Pass 4: Checking reference counts
Pass 5: Checking group summary information
Block bitmap differences: -(12--1033) -(32780--33801) -(65537--65546)...
Fix<y>? yes
Free blocks count wrong for group #0 (6582, counted=7604).
Fix<y>? yes
Free blocks count wrong for group #1 (14316, counted=15338).
Fix<y>? yes
Free blocks count wrong for group #2 (30603, counted=30613).
Fix<y>? yes
...
Free blocks count wrong for group #1006 (13, counted=23).
Fix<y>? yes
Free blocks count wrong for group #1007 (0, counted=10).
Fix<y>? yes
Free blocks count wrong for group #1008 (0, counted=10).
Fix<y>? yes
Free blocks count wrong for group #1009 (0, counted=10).
Fix<y>? yes
Free blocks count wrong (3497725, counted=3523005).
Fix<y>? yes
y
/dev/mailvg/mailvol: ***** FILE SYSTEM WAS MODIFIED *****
/dev/mailvg/mailvol: 2461667/39714816 files (2.1% non-contiguous),
36191811/39714816 blocks
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