From: Stan Hoeppner <stan@hardwarefreak.com>
To: linux-raid@vger.kernel.org
Subject: Re: advice to low cost hardware raid (with mdadm)
Date: Thu, 16 Sep 2010 23:38:59 -0500 [thread overview]
Message-ID: <4C92F0E3.5060207@hardwarefreak.com> (raw)
In-Reply-To: <4C929D19.80001@ziu.info>
Michal Soltys put forth on 9/16/2010 5:41 PM:
> On 10-09-16 00:03, Pol Hallen wrote:
>>
>>> additionally, in the event
>>> of a disk failure, rebuilding a 6x1TB RAID5/6 array will take forever
>>> and a day.
>>
>> a nightmare...
>>
>> very thanks for your reasoning.. I don't have enought experience about
>> raid and friends!
>>
>> Pol
>
> One remark - write intent bitmaps will make it perfectly fine (orders of
> magnitude faster). I'm not sure how the feature looks from performance
> point of view these days though.
My "forever and a day" RAID6 build/rebuild comment may have been taken
out of context. The original post was inquiring about running a qty 6
SATA disk md RAID6 array on a standard 132 MB/s PCI bus, using three 2
port PCI SATA cards on the single PCI bus. My comments were focused on
the PCI bottleneck in such a setup causing dreadful array performance.
--
Stan
prev parent reply other threads:[~2010-09-17 4:38 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-15 20:07 advice to low cost hardware raid (with mdadm) Pol Hallen
2010-09-15 20:41 ` Stan Hoeppner
2010-09-15 21:40 ` Keld Jørn Simonsen
2010-09-15 22:25 ` Stan Hoeppner
2010-09-16 12:05 ` Keld Jørn Simonsen
2010-09-15 22:03 ` Pol Hallen
2010-09-15 23:56 ` Stan Hoeppner
2010-09-16 22:41 ` Michal Soltys
2010-09-17 0:42 ` John Robinson
2010-09-17 4:38 ` Stan Hoeppner [this message]
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