Den fre 27 okt. 2023 kl 07:30 skrev Felix Natter <felix.nat...@sidact.com>:

> Dear svn experts,
>
> I do a daily dump+backup of my svn server. Without any known trigger
> (no server crash, except about 2 months ago I had a single I/O error on
> the
> ProxMox virtualization server), the dump of one repo failed with:
>
> svnadmin: E200046: LZ4 decompression failed
>
> The svnadmin verify I ran to double check that also failed for that one
> repo:
>
> verifying /repos/X/Y...
> * Error verifying repository metadata.
> svnadmin: E160004: Checksum mismatch in item at offset 18983705 of length
> 11921122 bytes in file /repos/X/Y/db/revs/0/221
>
> After I restored X/Y from the last backup, and ran a dump/backup/verify,
> everything is fine for 4 days now.
>
Good thing you did the dump/backup and verify steps!

Do I understand the issue occurred about a week ago, you restored the
backup and now it has been working fine for the last 4 days? As compared
with the known I/O error 2 month ago (ie, a lot earlier)?


> I couldn't find an error in the system logs (especially no I/O errors).
> The repos are on a HDD (in my experience they last longer than SSDs
> with lots of write activity, i.e. daily dumps/backups/etc...).
>
> Question: Can I rule out software failure?
>
It is difficult to rule out, but there are not many reports of this failure
so I would guess it is more likely to be a corrupted bit of data on your
HDD.


> I am running svn 1.14.1
> on ALMA Linux 8.x. Shall I install on a new HDD?
>
You should probably check the SMART stats on the drive (on the
virtualisation host!) or any other indications you might have on an
upcoming failure to see if the HDD is indeed the issue.


> No action needed?
> Any other advice?
>
> Many Thanks in Advance and Best Regards,
> Felix
>

Kind regards,
Daniel Sahlberg

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