From: Stefan *St0fF* Huebner <st0ff@gmx.net>
To: Caspar Smit <c.smit@truebit.nl>
Cc: jack wang <jack_wang@usish.com>, linux-scsi@vger.kernel.org
Subject: Re: ATA / mvsas issue.
Date: Thu, 01 Apr 2010 23:05:22 +0200 [thread overview]
Message-ID: <4BB50A92.3030205@gmx.net> (raw)
In-Reply-To: <1543.77.248.79.78.1270108509.squirrel@ketsers.dhs.org>
Am 01.04.2010 09:55, schrieb Caspar Smit:
>>
>>
>>> Hi all,
>>>
>>> Today I installed 16 fresh Western Digital WD5000BEVT (2,5") drives in
>>> one
>>> of our test servers.
>>>
>>> I created a software raid5 with a hotspare on these 16 disks.
>>>
>>> I noticed that the detection of the disks during boottime was very very
>>> slow.
>>> Creating the md superblocks went very very slow.
>>>
>>> After that all seemed fine (speed of the raid5 init was normal).
>>>
>>> I noticed many of these messages in the syslog (also attached):
>>>
>>> Mar 31 14:34:17 test ata_id[3752]: main: HDIO_GET_IDENTITY failed for
>>> '/dev/.tmp-8-112'
>>> Mar 31 14:34:17 test ata_id[3765]: main: HDIO_GET_IDENTITY failed for
>>> '/dev/.tmp-8-128'
>>>
>>> This seems to correspond to the slow detection of the disks.
>>>
>>> Is this an ATA problem, or a problem in the mvsas driver?
>>>
>>> I use the mvsas driver from 2.6.32 with the latest patch from Srinivas.
>>>
>>> Kind regards,
>>> Caspar Smit
>>>
>>>
>>> [Jack] It's normal behavior of SATA disk, SATA disk need more time than
>>> SAS
>>> disk to spin up to response command.
>>>
>> I use loads of other SATA disks which don't have this behavior.
>>
>> Caspar
>>
>>
>> [Jack] In my test, some big SATA disks(ie 500G above)have this issues.
>> Best Regards
>>
@Jack: sorry, but that doesn't cause unresponsiveness. Some 2TB
SATA-Disks need >10s to spin up, but there shouldn't be any notes/logs
like those. As a matter of fact: these 2,5" drives should spin up in a
matter of 2s.
> Seagate 500G SATA disks are working fine.
>
Hitachi also. And I've seen WD5000BEVT work great, too. 8 of a kind in
a QNAP SS-839 (Atom based NAS with a pretty recent linux on it) work fine!
Stefan
> Caspar
>
>
>> ************************************************************************
>> Jack Wang
>>
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next prev parent reply other threads:[~2010-04-01 21:29 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-31 13:03 ATA / mvsas issue Caspar Smit
2010-04-01 0:57 ` jack wang
2010-04-01 6:17 ` Caspar Smit
2010-04-01 6:57 ` jack wang
2010-04-01 7:55 ` Caspar Smit
2010-04-01 21:05 ` Stefan *St0fF* Huebner [this message]
2010-04-02 0:25 ` Joe Eykholt
2010-04-02 14:14 ` Caspar Smit
2010-04-09 15:52 ` Still havind major MVSAS issues Caspar Smit
2010-04-10 19:02 ` Still having " Jelle de Jong
2010-04-12 4:21 ` Still havind " Srinivas Naga Venkatasatya Pasagadugula - ERS, HCL Tech
2010-05-01 9:23 ` Jelle de Jong
2010-05-06 6:01 ` Srinivas Naga Venkatasatya Pasagadugula - ERS, HCL Tech
2010-05-06 6:44 ` Jelle de Jong
[not found] ` <6B62480106F2B34D8404CF2FDAA4D9EF7F36EFEE0C@CHN-HCLT-EVS06.HCLT.CORP.H CL.IN>
2010-05-06 12:14 ` Caspar Smit
2010-06-06 12:13 ` Jelle de Jong
2010-06-06 13:35 ` Konstantinos Skarlatos
2010-06-06 13:43 ` Konstantinos Skarlatos
2010-04-01 14:32 ` ATA / mvsas issue Caspar Smit
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