[OpenIndiana-discuss] Persistant ZFS set ID

[Ray Arachelian]

What worked for me in these cases is to rm  /etc/zfs/zpool.cache and
then reboot.
You'll need to import any pools (other than rpool) as this is where the
information about the pools is kept, including your ghost.



On 06/18/2014 02:40 PM, Reginald Beardsley via openindiana-discuss wrote:
> I'm not sure if it's related, but I had for a long time a phantom pool that would get listed by "zfs import".  i eventually figured out that there was  an old ZFS vdev label  left over from a previous disk layout.  " dd if=/dev/zero"  at the start and end of the unused slices cured that once I realized what was going on.  You might want to read the ZFS on disk format description. 
>
> https://maczfs.googlecode.com/files/ZFSOnDiskFormat.pdf
>
>  In my case I had been trying various slice alignments to resolve messages about the pool alignment with a 4k sector disk.
>
> Reg
>
> --------------------------------------------
> On Wed, 6/18/14, Michelle Knight <michelle at msknight.com> wrote:
>
>  Subject: [OpenIndiana-discuss] Persistant ZFS set ID
>  To: "John Doe via openindiana-discuss" <openindiana-discuss at openindiana.org>
>  Date: Wednesday, June 18, 2014, 1:14 PM
>  
>  Hi Folks,
>  
>  I changed a drive set and was using an old one as a backup,
>  so I put
>  the 1.5tb drive in and created a single ZFS drive called
>  "backup".
>  
>  It wouldn't import, even after reboot, update, etc...
>  
>  mich at jaguar:~# zpool
>  import backup
>  Assertion failed: rn->rn_nozpool == B_FALSE,
>  file ../common/libzfs_import.c, line 1080, function
>  zpool_open_func
>  Abort (core dumped)
>  
>  
>  So I removed the drive, put it in a Linux machine, destroyed
>  everything
>  I could find, wrote out a new partition table, put it back
>  in the
>  server and asked for a ZFS import...
>  
>  mich at jaguar:~# zpool
>  import
>     pool: tank
>       id: 13988636425947326543
>    state: ONLINE
>   status: The pool is formatted using a legacy on-disk
>  version.
>   action: The pool can be imported using its name or numeric
>  identifier,
>  though some features will not be available without an
>  explicit 'zpool
>  upgrade'. config:
>  
>          tank       
>  ONLINE
>            c3t4d0p0  ONLINE
>  
>  So I shut the server down, removed the legitimate "tank" and
>  tried to
>  then bring the server back up in order to mount this old
>  tank and
>  destroy it ...
>  
>  mich at jaguar:~# zpool
>  import
>  Assertion failed: rn->rn_nozpool == B_FALSE,
>  file ../common/libzfs_import.c, line 1080, function
>  zpool_open_func
>  Abort (core dumped) mich at jaguar:~# zpool
>  import
>     pool: tank
>       id: 13988636425947326543
>    state: ONLINE
>   status: The pool is formatted using a legacy on-disk
>  version.
>   action: The pool can be imported using its name or numeric
>  identifier,
>  though some features will not be available without an
>  explicit 'zpool
>  upgrade'. config:
>  
>          tank       
>  ONLINE
>            c3t4d0p0  ONLINE
>  mich at jaguar:~# zfs
>  destroy tank
>  cannot open 'tank': dataset does not exist
>  mich at jaguar:~# zpool
>  import tank
>  Assertion failed: rn->rn_nozpool == B_FALSE,
>          file ../common/libzfs_import.c,
>  line 1080, function
>          zpool_open_func Abort (core
>  dumped) mich at jaguar:~# init 6
>  
>  
>  ....
>  
>  Eventually, I got rid of tank and recreated the drive as
>  "backup",
>  changing the mount point to /mnt/backup, then exporting it,
>  and then
>  when I try to import it again ...
>  
>  Assertion failed: rn->rn_nozpool == B_FALSE,
>  file ../common/libzfs_import.c, line 1080, function
>  zpool_open_func
>  Abort (core dumped)
>  
>  ...and there was a "backup" directory left under /mnt/
>  
>  I'm getting this assertion failed all over again, and I just
>  can't
>  import backup. I just don't get it.  I wonder if the
>  change of mount
>  point caused the problem?
>  
>  
>  
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