From: berk walker <berk@panix.com>
To: Farkas Levente <lfarkas@bppiac.hu>
Cc: linux-raid@vger.kernel.org
Subject: Re: raid5 or raid6 and the maximum size
Date: Thu, 22 Sep 2005 12:28:58 -0400 [thread overview]
Message-ID: <4332DBCA.2090607@panix.com> (raw)
In-Reply-To: <4332AD95.1080904@bppiac.hu>
Farkas Levente wrote:
> hi,
> i'd like to know the current state of the raid6 driver. we are now
> switching one of our server from 8 x 200GB to 8 x 300GB(or 400GB).
> so which is the better if we use:
> - 7 x 300GB in raid5 and one 300GB spare or
> - 8 x 300GB in raid6?
> it seems the same to me since both case we can get two disk faild and
> the same capacity. so why we choose raid6 over raid5 (when raid5 seems
> to be more stable then raid6)?
> another question is there any upper limit for one raid5(6) partition?
> i read 1TB and 2TB too (although we already have a raid5 which is
> larger then 1TB). these are still real limit? or what is the current
> limit?
> thank you for your help in advance.
> yours.
>
With RAID5 and a spare, if another, rarely or never used area is found
to be bad on rebuild, your spare is of no use, and without heroic
measures, all is lost. RAID6 can handle that scenario.
b-
prev parent reply other threads:[~2005-09-22 16:28 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-22 13:11 raid5 or raid6 and the maximum size Farkas Levente
2005-09-22 13:52 ` Mario 'BitKoenig' Holbe
2005-09-22 16:28 ` berk walker [this message]
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