From: Florian Weimer <fweimer@bfk.de>
To: Yeb Havinga <yebhavinga@gmail.com>
Cc: Andy <angelflow@yahoo.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: BBU still needed with SSD?
Date: Tue, 19 Jul 2011 07:56:54 +0000
Message-ID: <82vcuyd7p5.fsf@mid.bfk.de> (raw)
In-Reply-To: <4E23E72B.2070508@gmail.com>
References: <1310953399.25726.YahooMailClassic@web111304.mail.gq1.yahoo.com>
<4E23E72B.2070508@gmail.com>
* Yeb Havinga:
> The biggest drawback of 2 SSD's with supercap in hardware raid 1, is
> that if they are both new and of the same model/firmware, they'd
> probably reach the end of their write cycles at the same time, thereby
> failing simultaneously.
I thought so too, but I've got two Intel 320s (I suppose, the report
device model is "SSDSA2CT040G3") in a RAID 1 configuration, and after
about a month of testing, one is down to 89 on the media wearout
indicator, and the other is still at 96. Both devices are
deteriorating, but one at a significantly faster rate.
--
Florian Weimer <fweimer@bfk.de>
BFK edv-consulting GmbH http://www.bfk.de/
Kriegsstraße 100 tel: +49-721-96201-1
D-76133 Karlsruhe fax: +49-721-96201-99
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To: pgsql-performance@postgresql.org
Cc: fweimer@bfk.de, yebhavinga@gmail.com, angelflow@yahoo.com
Subject: Re: BBU still needed with SSD?
In-Reply-To: <82vcuyd7p5.fsf@mid.bfk.de>
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