[OpenIndiana-discuss] Zpool crashes system on reboot and import

[CJ Keist]

On 12/12/13, 9:06 AM, Udo Grabowski (IMK) wrote:
> On 12/12/2013 16:14, Stephan Budach wrote:
>> Am 12.12.13 15:18, schrieb Jim Klimov:
>>> On 2013-12-12 14:38, Stephan Budach wrote:
>>>> So basically, I am still running with this work around of setting the
>>>> affected fs to read-only, before I export the zpool.
>>>> This server is under constant load and I just don't have the time and
>>>> resources to move all 370+ ZFS fs onto another storage.
>>>
>>> And how did you manage to set the read-only attribute the first time?
>>> Were there any problems or tricks involved? As CJ suggested, one
>>> wouldn't be able to do this on a pool imported read-only... did you
>>> import it without mounts indeed?
>>>
>>> //Jim
>>>
>> You surely can set the readonly attribute for a ZFS fs on a read-only
>> mounted zpool. Mounting the zpool readonly only seems to affect the
>> global setting. It seems to possible to change the ZFS FS attributes
>> without any issue. So the work around was…
>>
>> zpool import -o ro zpool
>> zfs set readonly=on zpool/zfs
>> zpool export zpool
>> zpool import zpool
>> zfs set readonly=off zpool/zfs
>>
>> This has always worked for me and it still does.
>
> Would be interesting to know under which cicumstances this problem
> appears. I saw from one of the crash dumps that there was a scrub
> active, could it be that this happens on servers which go down with
> an active scrub on that pool and fail to reactivate the scrub then ?
>

If looking at my post the Scrub was started after the system crashed.  I 
wanted to see if a scrub might fix the issue of importing this data pool 
in.  But when I saw the scrub was going to take 60+hours, I had to 
re-export it out and back in read only so I could start migrating data 
to a new location to keep the downtime to a minimum.

I not sure what caused the initial crash, I know I was working at the 
time through the web gui of NappIt, I think my last action on the web 
gui was to show all logical volumes.

>
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-- 
C. J. Keist                     Email: cj.keist at colostate.edu
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