[OmniOS-discuss] zdb doesn't find a pool

[Michael Mounteney]

Hello and apology to Dan to whom I've already mentioned this matter on
IRC.

Summary:  zdb doesn't see a pool specified by name.

My (home) server has three pools so:

================================================
# zpool status
  pool: rpool
 state: ONLINE
  scan: scrub repaired 0 in 0h2m with 0 errors on Sun Feb 19 14:01:41
2017 config:

        NAME        STATE     READ WRITE CKSUM
        rpool       ONLINE       0     0     0
          c2t0d0s0  ONLINE       0     0     0

errors: No known data errors

  pool: vault
 state: ONLINE
  scan: none requested
config:

        NAME          STATE     READ WRITE CKSUM
        vault         ONLINE       0     0     0
          raidz2-0    ONLINE       0     0     0
            c2t1d0s0  ONLINE       0     0     0
            c2t2d0s0  ONLINE       0     0     0
            c2t3d0s0  ONLINE       0     0     0
            c2t5d0s0  ONLINE       0     0     0

errors: No known data errors

  pool: woz
 state: ONLINE
  scan: resilvered 359G in 8h21m with 0 errors on Fri Mar 17 03:16:51
  2017 config:

        NAME        STATE     READ WRITE CKSUM
        woz         ONLINE       0     0     0
          c2t4d0s0  ONLINE       0     0     0

errors: No known data errors
================================================

However, zdb won't see the pool 'woz':

================================================
# zdb vault | head -4

Cached configuration:
        version: 5000
        name: 'vault'
# zdb woz
zdb: can't open 'woz': No such file or directory
# zdb -l /dev/rdsk/c2t4d0s0 | head -6
--------------------------------------------
LABEL 0
--------------------------------------------
    version: 5000
    name: 'woz'
    state: 0
================================================

So zdb finds pool 'vault' alright but not 'woz'.  It will however see
'woz' if it's referred-to by disk.  The difference which I think might
be crucial is that 'vault' was created via zpool create, whereas 'woz'
was created via zpool split.  In the full output of zdb
-l /dev/rdsk/c2t4d0s0 (omitted here for brevity), there are four labels
numbered 0 to 3.  The output is much shorter as well;  it doesn't list
the individual file objects as zdb vault does.

Is this worth a mention on https://www.illumos.org/issues ?

______________
Michael Mounteney