[OpenIndiana-discuss] zpool import not possible after slot change

[Hugh McIntyre]

I had a similar error when moving some disks around in a case where 
disks/pools moved from direct-attach SATA to/from a SAS expansion card.

The original problem I saw was "invalid vdev configuration" although 
other cases reported data corruption.  You may also want to check 
/var/adm/messages for errors such as:

Dec 23 08:56:57 zbackup zfs: [ID 101897 kern.notice] NOTICE: 
vdev_disk_open /dev/dsk/c11t0d0s0: update devid from 'id1,sd at SATA_____ST40
00VN008-2DR1____________ZGY7RTPN/a' to 
'id1,sd at SATA_____ST14000NM001G-2K____________ZL20DAZ9/a'
Dec 23 08:56:57 zbackup zfs: [ID 844310 kern.notice] NOTICE: 
vdev_disk_open /dev/dsk/c11t0d0s0: devid mismatch: id1,sd at SATA_____ST4000V
N008-2DR1____________ZGY7RTPN/a != 
id1,sd at SATA_____ST14000NM001G-2K____________ZL20DAZ9/a


The problem seems to be caused because the system tries to open your 
disk under id1,sd at n50000396b5803dd2/a, then sees the label pointing to 
c8t2d0s0, at which point ZFS tries to open *that* disk and stops because 
it decides that pool is corrupted (not "bkp1t").  Or vice versa on the 
paths.

The solution is to import disks one at a time while making sure no disk 
is attached at the old connection position.  Then export the disks one 
at a time.  Finally attach and re-import everything once the 
crossed-path disks are cleanly exported.

This does seem like a bug, but hopefully not an issue if you export the 
pool rather than just disconnecting.

Hugh.



On 4/15/21 5:02 AM, Stephan Althaus wrote:
> Hello!
> 
> I have a 1-disk pool which i use only from time to time.
> 
> Normally i would expect that i can import the pool after installing the 
> disk again, (on 'cold' machine, boot with --reconfigure) the slot is not 
> relevant.
> 
> Just to check that disk and zfs label are ok, i mounted the pool on a 
> linux machine, everything is ok there.
> 
> On OI i cant import the pool, the "-f" flag does not help.
> 
> Details below.
> 
> Btw, just to be clear, I had this same error before i tried to import 
> the pool with linux, so the import with linux is not the origin of the 
> problem here.
> 
> Any hints on how to dig into this further are welcome!
> 
> Thanks!
> 
> Stephan
> 
> ________________________________________
> 
> # zpool import
> Password:
>     pool: bkp1t
>       id: 4466948378057274312
>    state: FAULTED
>   status: The pool was last accessed by another system.
>   action: The pool cannot be imported due to damaged devices or data.
>          The pool may be active on another system, but can be imported 
> using
>          the '-f' flag.
>     see: http://illumos.org/msg/ZFS-8000-EY
>   config:
> 
>          bkp1t       FAULTED  corrupted data
>            c8t2d0s0  UNAVAIL  corrupted data
> 
> # zdb -l /dev/rdsk/c8t2d0s0
> ------------------------------------
> LABEL 0
> ------------------------------------
>      version: 5000
>      name: 'bkp1t'
>      state: 0
>      txg: 26349
>      pool_guid: 4466948378057274312
>      errata: 0
>      hostid: 758768731
>      hostname: 'Fuji'
>      top_guid: 15764649591111927753
>      guid: 15764649591111927753
>      vdev_children: 1
>      vdev_tree:
>          type: 'disk'
>          id: 0
>          guid: 15764649591111927753
>          path: '/dev/sda1'
>          devid: 'id1,sd at n50000396b5803dd2/a'
>          phys_path: '/pci at 0,0/pci8086,c01 at 1/pci1734,11e4 at 0/sd at 4,1:a'
>          whole_disk: 0
>          metaslab_array: 256
>          metaslab_shift: 33
>          ashift: 13
>          asize: 987837759488
>          is_log: 0
>          create_txg: 4
>      features_for_read:
>          com.delphix:hole_birth
>          com.delphix:embedded_data
>      labels = 0 1 2 3
> 
> 
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