[OpenIndiana-discuss] OpenIndiana-discuss Digest, Vol 39, Issue 26

[Sebastian Gabler]

Hello Clement,

there is no specific reason I know of to run a scrub right after a 
re-silver. In respect to your array, I have some doubts that the 
re-silver will ever complete. As much as the rubber pads are concerned, 
I am not sure either if they are part of the problem after all. Elastic 
mounting only handles a part of the vibration. It makes a narrow-band 
resonance filter. Due to interferences you may have beat frequency 
issues that will never be isolated by any material, and the rubber may 
even cause additional problems for the head actors.
To nail down possible vibration issues you should un-mount all drives 
from the enclosure and place them on firm foam rubber.

BR

Sebastian
>
>
>
> ------------------------------
>
> Message: 3
> Date: Wed, 23 Oct 2013 11:01:12 +0200
> From: Clement BRIZARD <clement at brizou.fr>
> To: openindiana-discuss at openindiana.org
> Subject: Re: [OpenIndiana-discuss] [zfs] problem on my zpool
> Message-ID: <52679058.7090903 at brizou.fr>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> The disks are in a Fractal XL case which have little rubber pad to
> contain vibrations.
> As long as it works I will leave it. When I will have some money I will
> build a proper server
>
> Once the resilvering is done, should I do a scrub job ?
>
>
> Le 23/10/2013 10:16, Sebastian Gabler a ?crit :
>>  From 'zpool status' this looks very much like an issue I had myself
>> 2.5 years ago with a pool containing WD20EARS and some other 2 TB
>> disks. It started exactly when I moved them from the Intel ICH to an
>> LSI SAS 1068 controller, and added more disks to the enclosure. I
>> decided then to destroy the whole pool and restore the data from a
>> backup (well, actually the original source because the broken pool was
>> the backup), without the WD20EARS involved.
>>
>> I wonder if there is any rescue for the pool moving them to an adapter
>> they are compatible. I think that in any case the WD20EARS should be
>> fine, given you can make them work.
>>
>> However, there is another issue to keep in mind: Vibration. WD20EARS
>> are not specified to run in multi-disk enclosures. They are quite
>> susceptible to vibration issues. It could be that you simple hit your
>> head to the wall at that point. Better use disks with better vibration
>> management.
>>
>> BR
>>
>> Sebastian
>>
>> ------------------------------ Message: 2 Date: Wed, 23 Oct 2013
>> 20:21:39 +1300 From: Mark <mark0x01 at gmail.com> To: Discussion list for
>> OpenIndiana <openindiana-discuss at openindiana.org> Subject: Re:
>> [OpenIndiana-discuss] [zfs] problem on my zpool Message-ID:
>> <52677903.3030002 at gmail.com> Content-Type: text/plain;
>> charset=ISO-8859-1; format=flowed One suggestion for the future for
>> better reliability. Avoid using WDC WD20EARS, they aren't great, and
>> hopeless on SAS controllers. Avoid mixing disk brands or models in a
>> zpool. The different behaviour can trigger issues. On 23/10/2013 7:46
>> p.m., Clement BRIZARD wrote:
>>>> I cleared the "degraded" disk. we will see what happens  in 131hours
>>>>
>>>>      pool: nas
>>>>     state: ONLINE
>>>> status: One or more devices is currently being resilvered. The pool
>>>> will
>>>>        continue to function, possibly in a degraded state.
>>>> action: Wait for the resilver to complete.
>>>>      scan: resilver in progress since Wed Oct 23 08:25:56 2013
>>>>        2.23G scanned out of 22.2T at 48.6M/s, 133h22m to go
>>>>        6.10M resilvered, 0.01% done
>>>> config:
>>>>
>>>>        NAME                         STATE     READ WRITE CKSUM
>>>> CAP            Product
>>>>        nas                          ONLINE       0     0     0
>>>>          raidz1-0                   ONLINE       0     0     0
>>>>            c8t50024E9004993E6Ed0p0  ONLINE       0     0 0     2
>>>> TB           SAMSUNG HD204UI
>>>>            c8t50024E92062E7524d0    ONLINE       0     0 0     2
>>>> TB           SAMSUNG HD204UI
>>>>            c8t50024E900495BE84d0p0  ONLINE       0     0 0     2
>>>> TB           SAMSUNG HD204UI
>>>>            c8t50014EE25A5EEC23d0p0  ONLINE       0     0 0     2
>>>> TB           WDC WD20EARS-00M
>>>>            c8t50024E9003F03980d0p0  ONLINE       0     0 0     2
>>>> TB           SAMSUNG HD204UI
>>>>            c8t50014EE2B0D3EFC8d0    ONLINE       0     0 0     2
>>>> TB           WDC WD20EARX-00P
>>>>            c8t50014EE6561DDB4Cd0p0  ONLINE       0     0 0     2
>>>> TB           WDC WD20EARS-00M
>>>>            c8t50024E9003F03A09d0p0  ONLINE       0     0 0     2
>>>> TB           SAMSUNG HD204UI
>>>>          raidz1-1                   ONLINE       0     0     0
>>>>            c50t8d0                  ONLINE       0     0     0
>>>> (resilvering)     2 TB           ST2000DL004 HD20
>>>>            c2d0                     ONLINE       0     0     0
>>>> (resilvering)     2 TB
>>>>            c1d0                     ONLINE       0     0     0
>>>> (resilvering)     2 TB
>>>>            c50t11d0                 ONLINE       0     0 0     2
>>>> TB           SAMSUNG HD204UI
>>>>            c50t10d0                 ONLINE       0     0     0
>>>> (resilvering)     2 TB           SAMSUNG HD204UI
>>>>
>>>>
>>
>> _______________________________________________
>> OpenIndiana-discuss mailing list
>> OpenIndiana-discuss at openindiana.org
>> http://openindiana.org/mailman/listinfo/openindiana-discuss
>
>