From: Lars Marowsky-Bree <lmb@suse.de>
To: Neil Brown <neilb@suse.de>, Bill Davidsen <davidsen@tmr.com>
Cc: Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: Thoughts on using SSD
Date: Sat, 4 Apr 2009 01:28:55 +0200 [thread overview]
Message-ID: <20090403232855.GY2449@suse.de> (raw)
In-Reply-To: <18892.22531.392563.258229@notabene.brown>
On 2009-03-27T15:37:23, Neil Brown <neilb@suse.de> wrote:
> .... I wonder if it would make sense to mirror two partitions of the
> one SSD?? It would save you from media errors and only expose you to
> total-drive-death errors.
Depends; SSDs have different failure modes. One of them is that for
performance, memory is often interleaved and heavily remapped. So if one
of the cells dies, you may in fact lose random sectors in _both_ of your
partitions, so they wouldn't be independent and not necessarily make for
good RAID targets ;-)
Regards,
Lars
--
Teamlead Kernel, SuSE Labs, Research and Development
SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg)
"Experience is the name everyone gives to their mistakes." -- Oscar Wilde
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next prev parent reply other threads:[~2009-04-03 23:28 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-26 23:09 Thoughts on using SSD Bill Davidsen
2009-03-27 0:51 ` David Rees
2009-03-27 4:31 ` Neil Brown
2009-03-27 4:37 ` Neil Brown
2009-04-03 23:28 ` Lars Marowsky-Bree [this message]
2009-04-09 22:26 ` Bill Davidsen
2009-04-10 9:14 ` Neil Brown
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