Re: failed command: WRITE FPDMA QUEUED, suspiciously on two different disks

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On Wed, Jun 24, 2015 at 11:45:53 +0100, Tim Small wrote:
> On 23/06/15 20:00, Sami Farin wrote:
> > SMART does not show problems and disks are working OK, but I have not
> > ran tests recently..
> 
> Are you running smartd, or using other monitoring tools to periodically
> run smartctl against these drives?  I've had problems with this sort of
> vintage of WD drives aborting other commands and resetting when making
> simultaneous SMART enquiries.
> 
> BTW, looks to me like the drives are on the Intel controller, is that
> correct?
> 
> Tim.
> 
> -- 

Not executing smartctl.  Maybe they are on Intel controller..

But, to reproduce:

dmsetup info backup596g-1 || cryptsetup --key-file ~/important/backup596g-1-key.bin open \
  /dev/disk/by-partlabel/backup596g-1 backup596g-1 && mount -t xfs -o noatime,nosuid,nodev \
  /dev/mapper/backup596g-1 /mnt/backup596g-1

dmsetup info backup596g-2 || cryptsetup --key-file ~/important/backup596g-2-key.bin open \
  /dev/disk/by-partlabel/backup596g-2 backup596g-2 && mount -t xfs -o noatime,nosuid,nodev \
  /dev/mapper/backup596g-2 /mnt/backup596g-2

(then I umount them as root and mount again as normal luser)

[safari@safari ~]$ mount /mnt/backup596g-1
[safari@safari ~]$ mount /mnt/backup596g-2
mount: /dev/mapper/backup596g-2: can't read superblock

here I run xfs_repair

[safari@safari ~]$ mount /mnt/backup596g-2
mount: /dev/mapper/backup596g-2: can't read superblock

here I run xfs_repair again

[safari@safari ~]$ umount /mnt/backup596g-2
umount: /mnt/backup596g-2: not mounted
[safari@safari ~]$ umount /mnt/backup596g-1

but if I umount backup596g-1 first, I can mount backup596g-2 without causing corruption?!?

[safari@safari ~]$ mount /mnt/backup596g-2
[safari@safari ~]$ mount /mnt/backup596g-1

Note: added Cc: dm-devel@xxxxxxxxxx

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