Re: ext4 file system corruption - again

From	Jesper Dybdal <jd-debian-user@dybdal.dk>
Newsgroups	linux.debian.user
Subject	Re: ext4 file system corruption - again
Date	2024-09-26 15:30 +0200
Message-ID	<JqWJb-eYe1-1@gated-at.bofh.it> (permalink)
References	<JpNyh-efLc-3@gated-at.bofh.it> <JpS4V-eivZ-1@gated-at.bofh.it>
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On 2024-09-23 16:10, Stefan Monnier wrote:
>> root has been mounted 13 times without being checked, check forced.
>> root: Inode 10748715, i_blocks is 281474976710631, should be 5. FIXED.
>                                      ^^^^^^^^^^^^^^^
> AKA -25
>
>> root: Inode 10751288, i_blocks is 281474976710647, should be 3. FIXED.
>                                      ^^^^^^^^^^^^^^^
> AKA -9
>
> It's odd that it looks like -N².  Maybe it's just happenstance, but I'd
> be curious to see if you have other "data points".
>
One more "data point" just appeared today.  I had edited /etc/fstab and 
rebooted, and then fstab suddenly had the problem.:

root: Inode 10748542, i_blocks is 281474976710653, should be 1. FIXED.
AKA -3, so not of the -N² form.

 From a stat() (after the fsck that repaired the file):
   File: fstab
   Size: 1855          Blocks: 8          IO Block: 4096   regular file

I haven't yet had time to describe the problem on the ext4 mailing 
list.  I have remembered that there is one thing I do differently from 
the default: I use the ext4 option "nodelalloc" (because several years 
ago, there was a discussion about "delalloc or not" from which It seemed 
that nodelalloc was probably slightly safer - if the associated 
performance reduction is not a problem, which it is not for me).

I've now turned nodelalloc off, just in case that changes something.

-- 
Jesper Dybdal
https://www.dybdal.dk

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ext4 file system corruption - again Jesper Dybdal <jd-debian-user@dybdal.dk> - 2024-09-23 11:30 +0200
  Re: ext4 file system corruption - again Arno Lehmann <al@its-lehmann.de> - 2024-09-23 12:00 +0200
    Re: ext4 file system corruption - again Jesper Dybdal <jd-debian-user@dybdal.dk> - 2024-09-24 11:10 +0200
  Re: ext4 file system corruption - again Stefan Monnier <monnier@iro.umontreal.ca> - 2024-09-23 16:20 +0200
    Re: ext4 file system corruption - again Jesper Dybdal <jd-debian-user@dybdal.dk> - 2024-09-26 15:30 +0200

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