From: Ian Pilcher <arequipeno@gmail.com>
To: linux-raid@vger.kernel.org
Subject: Re: Multiple SSDs - RAID-1, -10, or stacked? TRIM?
Date: Wed, 09 Oct 2013 09:46:43 -0500 [thread overview]
Message-ID: <l33q8a$da4$1@ger.gmane.org> (raw)
In-Reply-To: <20131009123135.GT1779@bitfolk.com>
On 10/09/2013 07:31 AM, Andy Smith wrote:
> Any insights appreciated.
Consider the probable failure mode of an SSD. An SSD is more likely
than an HDD to (1) die with absolutely no warning and (2) die due to
the pattern of data written to it over its lifetime (and the way those
writes interact with the SSD's controller/firmware).
#2 in particular means that there is potentially a much higher
correlation between the failures of SSDs in an array than there is of
HDDs. (And #1 means that the consequences will be more catastrophic.)
I would recommend using SSDs with two different types on controllers.
--
========================================================================
Ian Pilcher arequipeno@gmail.com
Sometimes there's nothing left to do but crash and burn...or die trying.
========================================================================
next prev parent reply other threads:[~2013-10-09 14:46 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-09 12:31 Multiple SSDs - RAID-1, -10, or stacked? TRIM? Andy Smith
2013-10-09 13:00 ` Roberto Spadim
2013-10-09 13:27 ` David Brown
2013-10-09 13:52 ` Roberto Spadim
2013-10-09 14:46 ` Ian Pilcher [this message]
2013-10-09 16:21 ` David Brown
2013-10-09 17:33 ` Ian Pilcher
2013-10-09 18:04 ` Roberto Spadim
2013-10-09 19:08 ` David Brown
2013-10-09 20:35 ` SSD reliability; was: " Matt Garman
2013-10-09 21:17 ` David Brown
2013-10-09 21:46 ` Brian Candler
2013-10-10 6:14 ` Mikael Abrahamsson
2013-10-10 16:18 ` Art -kwaak- van Breemen
2013-10-10 9:15 ` Stan Hoeppner
2013-10-10 20:37 ` Andy Smith
2013-10-11 8:30 ` David Brown
2013-10-11 9:37 ` Stan Hoeppner
2013-10-11 8:42 ` David Brown
2013-10-11 11:00 ` Art -kwaak- van Breemen
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