From: Scott Marlowe <smarlowe@g2switchworks.com>
To: James Mansion <james@mansionfamily.plus.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Bruce Momjian <bruce@momjian.us>
Cc: Joshua D. Drake <jd@commandprompt.com>
Cc: mark@mark.mielke.cc, Andreas Kostyrka <andreas@kostyrka.org>
Cc: jason@ohloh.net, Geoff Tolley <geoff@polimetrix.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: SCSI vs SATA
Date: Thu, 05 Apr 2007 16:13:32 -0500
Message-ID: <1175807611.9839.120.camel@state.g2switchworks.com> (raw)
In-Reply-To: <HCEPKPMCAJLDGJIBCLGHEENIHGAA.james@mansionfamily.plus.com>
References: <HCEPKPMCAJLDGJIBCLGHEENIHGAA.james@mansionfamily.plus.com>
On Thu, 2007-04-05 at 14:30, James Mansion wrote:
> >Server drives are generally more tolerant of higher temperatures. I.e.
> >the failure rate for consumer and server class HDs may be about the same
> >at 40 degrees C, but by the time the internal case temps get up to 60-70
> >degrees C, the consumer grade drives will likely be failing at a much
> >higher rate, whether they're working hard or not.
>
> Can you cite any statistical evidence for this?
Logic?
Mechanical devices have decreasing MTBF when run in hotter environments,
often at non-linear rates.
Server class drives are designed with a longer lifespan in mind.
Server class hard drives are rated at higher temperatures than desktop
drives.
Google can supply any numbers to fill those facts in, but I found a
dozen or so data sheets for various enterprise versus desktop drives in
a matter of minutes.
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To: pgsql-performance@postgresql.org
Cc: smarlowe@g2switchworks.com, james@mansionfamily.plus.com, tgl@sss.pgh.pa.us, bruce@momjian.us, jd@commandprompt.com, andreas@kostyrka.org, geoff@polimetrix.com
Subject: Re: SCSI vs SATA
In-Reply-To: <1175807611.9839.120.camel@state.g2switchworks.com>
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