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Re: ext4 file system corruption - again

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Hi Jesper,

Am 23.09.2024 um 11:20 schrieb Jesper Dybdal:
...
 > ---------------- fsck log:
 > Log of fsck -C -a -T -t ext4 /dev/md0
 > Sun Sep 22 20:20:13 2024
 >
 > root has been mounted 13 times without being checked, check forced.
 > root: Inode 10748715, i_blocks is 281474976710631, should be 5. FIXED.
 > root: Inode 10751288, i_blocks is 281474976710647, should be 3. FIXED.
 > root: 223986/32759808 files (6.5% non-contiguous), 6827061/131038976 
blocks


I do not think it is likely to be a hardware problem. The bit patterns 
for the number of blocks you quote actually have all the high bits of 
the potentially used 48 bits of the block count set, for example 
111111111111111111111111111111111111111111100111 and given that the 16 
higher bits are not stored next to the lower 32 bits, there should be 
many other values and flags set to all ones, which should result in 
other things to notice -- for example, the file should be considered to 
be part of the file system structure and compressed, which fsck should 
loudly complain about (not verified).

The large values with peculiar bit patterns do look like some flag 
values to me. It might be worth asking among the ext4 developers if 
those values could be introduced by some particular condition, I think.

Cheers,

Arno

-- 
Arno Lehmann

IT-Service Lehmann
Sandstr. 6, 49080 Osnabrück

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Thread

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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