CentOS 7 : Group descriptors corrupted

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supmethods
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Joined: 2011/07/15 08:24:11

CentOS 7 : Group descriptors corrupted

Post by supmethods » 2022/09/19 01:43:45

I found the following in dmesg and I am wondering what I can do to fix it:

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EXT4-fs (snumbd1d): group descriptors corrupted
Will I need to take the server offline in order to recover the file system or is it possible to do it without taking the server offline?

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EXT4-fs (snumbd1d): ext4_check_descriptors: Checksum for group 128 failed (22619!=896)
EXT4-fs (snumbd1d): group descriptors corrupted!
snumbd_open_blk(blkid,65537): Disable access (515,210331,210331)...
snumbdctl_release(mms,223881): OK s=ffff88001f1ea000
snumbdctl_open(mms,223881): OK s=ffff88001f1ea000
session_init(mms,223881): OK. kdev=fc:1, len=16351232 sect=512 s=ffff88001f1ea000 pgrp=(210331).
snumbd_open_blk(blkid,65545): Disable access (515,210331,210331)...
snumbd_open_blk(udisks-part-id,65546): Disable access (515,210331,210331)...
snumbdctl_release(mms,223881): OK s=ffff88001f1ea000

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TrevorH
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Re: CentOS 7 : Group descriptors corrupted

Post by TrevorH » 2022/09/19 01:49:13

You can only run fsck against an unmounted filesystem so you will need to be able to do that. If this is your root filesystem or anything used by essential services that are required to boot up then you will need to reboot from alternate boot media (the install iso image has a 'rescue' option off the troubleshooting menu) and run fsck from there. If this is a filesystem that you can umount while the server is up then you can do that and then run fsck against it and remount it.
CentOS 8 died a premature death at the end of 2021 - migrate to Rocky/Alma/OEL/Springdale ASAP.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are dead, do not use them.
Use the FAQ Luke

supmethods
Posts: 54
Joined: 2011/07/15 08:24:11

Re: CentOS 7 : Group descriptors corrupted

Post by supmethods » 2022/09/19 23:39:54

Is there a way to determine which partition is having issues from the snippet provided?

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TrevorH
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Re: CentOS 7 : Group descriptors corrupted

Post by TrevorH » 2022/09/20 00:16:02

Nothing there that I can see helps. There's a mention of "kdev=fc:1" but I can't see anything on any of the systems that I maintain that has any entries in /dev using a major node of 252 (0xfc) though LVM seems to use 253.
CentOS 8 died a premature death at the end of 2021 - migrate to Rocky/Alma/OEL/Springdale ASAP.
Info for USB installs on http://wiki.centos.org/HowTos/InstallFromUSBkey
CentOS 5 and 6 are dead, do not use them.
Use the FAQ Luke

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