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

[Dan McDonald]

That woz was the result of zpool split is news to me (or I missed it, in which case I apologize).

I wonder if a toy test with files ala the zfs test suite can reproduce this?

- create 3-way mirror
- zdb
- split one disk
- zdb original and split-created pool

Adding illumos zfs list.

Dan

Sent from my iPhone (typos, autocorrect, and all)

> On Apr 15, 2017, at 9:19 PM, Michael Mounteney <gate03 at landcroft.co.uk> wrote:
> 
> 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
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