[OpenIndiana-discuss] ZFS Pool configuration hanging around

[Michelle Knight]

I'm using an external caddy to mount "backup" drives to. The ZFS pools are, 
rather imaginatively, called, "backup."

However, there seems to be a phantom of an old set that was present when the 
machine hung once upon a time, and I can't get rid of it. I've tried deleting 
/etc/zfs/zpool.cache but no joy.

Here you can see the problem. A single drive is on c3d0p0, called "backup." (I 
know, there is no redundancy, I'm testing)

A zpool import shows both the valid drive but also the phantom set.

This means I've got to import the pool via the id number.

mich at jaguar:/etc/zfs# zpool import
  pool: backup
    id: 10642222873577100856
 state: ONLINE
status: The pool is formatted using an older 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:

        backup      ONLINE
          c3d0p0    ONLINE

  pool: backup
    id: 15407100200514227053
 state: FAULTED
status: One or more devices are missing from the system.
action: The pool cannot be imported. Attach the missing
        devices and try again.
        The pool may be active on another system, but can be imported using
        the '-f' flag.
   see: http://www.sun.com/msg/ZFS-8000-3C
config:

        backup        FAULTED  corrupted data
          mirror-0    DEGRADED
            c2t4d0p0  ONLINE
            c5t0d0    UNAVAIL  cannot open


Anyone know how to get rid of this phantom set from the system please? I've 
tried "destroy" but it obviously can't find the pool to get rid of it.

To make it worse, the drive on c2t4d0p0 was part of the faulted backup set.

Should I reboot after clearing the zpool cache file? Would that be the missing 
step?

I know ... I get myself in to some really dumb situations, don't I.

Michelle.