[OpenIndiana-discuss] rpool mirror disk problems when moved to different slot

[Stephan Althaus]

On 8/6/21 12:59 PM, Michelle wrote:
> Ah, if you're moving a live rpool, that's a bit more complex.
>
> I'd have destroyed the mirror, moved the drive and then re-mirrored...
> but only if I'd put another boot on the other drive.
>
> After all, if you've mirrored your rpool, but there's no boot on the
> mirror drive, then it will still not boot the mirror drive.
>
>
>
> On Fri, 2021-08-06 at 12:54 +0200, Stephan Althaus wrote:
>> On 8/6/21 12:47 PM, Michelle wrote:
>>> Did you export the zpool before moving the drives and then import
>>> again
>>> after?
>>>
>>> If I don't export before I move things, then I wouldn't expect ZFS
>>> to
>>> be able to track it automatically.
>>>
>>>
>>>
>>> On Fri, 2021-08-06 at 11:19 +0200, Stephan Althaus wrote:
>>>> Hello!
>>>>
>>>> i just added a new disk to my system, which i put into the slot
>>>> where
>>>> a
>>>> mirror disk of my rpool resided.
>>>>
>>>> The mirror disk of my rpool went to a other slot, so the device
>>>> name
>>>> was
>>>> changed c27t1d0 -> c27t0d0
>>>>
>>>> Booting into my OI system, the zpool was found as the first
>>>> mirror
>>>> disk
>>>> was there,
>>>> but the second partition was not found.
>>>>
>>>>
>>>> Is there a chance that the rpool mount procedure could try harder
>>>> to
>>>> find the mirrors, even when moved ??
>>>>
>>>>
>>>> Yes i know this may be a rare case :-/
>>>>
>>>>
>>>> Greetings,
>>>>
>>>> Stephan
>>>>
>>>>
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>> Hi!
>>
>> This is my root pool, is it exported on shutdown? i would think so..
>>
>> I think, if i move the mirror drive to a different slot and leave the
>> origin-slot empty, it could work..
>>
>> I should have imported and exported the pool with a illumos-live-
>> USB, 
>> _before_ trying to boot the installed system with the change.
>>
>> i had no live-medium at hand so i just gave it a try..
>>
>> Stephan
>>
>> BTW, the mirrored pool is up and working:
>>
>> $ zpool status rpool
>>   pool: rpool
>>  state: ONLINE
>>   scan: resilvered 194G in 0 days 00:50:39 with 0 errors on Fri Aug 
>> 6
>> 12:04:20 2021
>> config:
>>
>>     NAME                         STATE     READ WRITE CKSUM
>>     rpool                        ONLINE       0     0     0
>>       mirror-0                   ONLINE       0     0     0
>>         c9t002538B471B9EFD3d0s8  ONLINE       0     0     0
>>         c27t0d0s0                ONLINE       0     0     0
>>
>>
>>
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>
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Yes, Michelle, you're right.

The intention of my thread was to enhance the automagically discovered
changes.

There have been efforts to re-import pools that have been im- and
exported on linux and changed the device names.

My case is just another one that (maybe) could be handled automagically,
without user intervention.

...

Stephan