Control: severity -1 important
Control: tag -1 moreinfo

On Thu, 20 Aug 2015 00:23:38 +0200 Dan Smolik <mar...@mydatex.cz> wrote:
> Package: src:linux
> Version: 3.16.7-ckt11-1+deb8u3
> Severity: critical
> Justification: causes serious data loss

That's not correct, unless you are also unable to read back previously
written data after the write failure.

> Dear Maintainer,
> 
> I have installed new system to little old HW. Connect 3 disks and made RAID5 
> array on top of this array 
> I made volumegroup data. Create volume about 800G. Format it with ext4. And 
> start copynig data.
> And after couple of hour I get this:
> 
> [252440.711127] EXT4-fs warning (device dm-5): ext4_end_bio:317: I/O error -5 
> writing to inode 35913733 (offset 167268843520 size 3674112 starting block 
> 95985792)
> [252440.711799] buffer_io_error: 246 callbacks suppressed
> [252440.712032] Buffer I/O error on device dm-5, logical block 95985792
> [252440.712308] Buffer I/O error on device dm-5, logical block 95985793
> [252440.712585] Buffer I/O error on device dm-5, logical block 95985794
> [252440.712879] Buffer I/O error on device dm-5, logical block 95985795
> [252440.713162] Buffer I/O error on device dm-5, logical block 95985796
> [252440.713419] Buffer I/O error on device dm-5, logical block 95985797
> [252440.713691] Buffer I/O error on device dm-5, logical block 95985798
> [252440.713953] Buffer I/O error on device dm-5, logical block 95985799
> [252440.714213] Buffer I/O error on device dm-5, logical block 95985800
> [252440.714467] Buffer I/O error on device dm-5, logical block 95985801
> [252440.714820] EXT4-fs warning (device dm-5): ext4_end_bio:317: I/O error -5 
> writing to inode 35913733 (offset 167268843520 size 3674112 starting block 
> 95985664)
> And copying files fails. Switching to XFS solve problem.

Which of the many ATA/SCSI controllers in this system are the disks
attached to?  What model are they, and are they new or old?

Ben.

-- 
Ben Hutchings
Life would be so much easier if we could look at the source code.

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