From: Alvaro Herrera <alvherre@commandprompt.com>
To: Andreas Kostyrka <andreas@kostyrka.org>
Cc: Peter Kovacs <maxottovonstirlitz@gmail.com>
Cc: david@lang.hm <david@lang.hm>
Cc: Geoff Tolley <geoff@polimetrix.com>
Cc: Ron <rjpeace@earthlink.net>
Cc: jason@ohloh.net <jason@ohloh.net>
Cc: pgsql-performance@postgresql.org
Subject: Re: SCSI vs SATA
Date: Wed, 4 Apr 2007 09:19:20 -0400
Message-ID: <20070404131920.GA8549@alvh.no-ip.org> (raw)
In-Reply-To: <20070404124640.GC20893@andi-lap.la.revver.com>
References: <9C0858F5-0A48-4AF9-80FF-E4BA14F0F965@ohloh.net>
<E1HYs6Y-0008O5-SN@elasmtp-banded.atl.sa.earthlink.net>
<E1HYsBX-0006ZE-JG@elasmtp-banded.atl.sa.earthlink.net>
<4613053F.5070401@polimetrix.com>
<Pine.LNX.4.64.0704032106210.30746@asgard.lang.hm>
<b6e8f2e80704040416s1537b907g2dc5290dbb4c571b@mail.gmail.com>
<20070404124640.GC20893@andi-lap.la.revver.com>
Andreas Kostyrka escribió:
> * Peter Kovacs <maxottovonstirlitz@gmail.com> [070404 14:40]:
> > This may be a silly question but: will not 3 times as many disk drives
> > mean 3 times higher probability for disk failure? Also rumor has it
> > that SATA drives are more prone to fail than SCSI drivers. More
> > failures will result, in turn, in more administration costs.
> Actually, the newest research papers show that all discs (be it
> desktops, or highend SCSI) have basically the same failure statistics.
>
> But yes, having 3 times the discs will increase the fault probability.
... of individual disks, which is quite different from failure of a disk
array (in case there is one).
--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.
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To: pgsql-performance@postgresql.org
Cc: alvherre@commandprompt.com, andreas@kostyrka.org, maxottovonstirlitz@gmail.com, david@lang.hm, geoff@polimetrix.com, rjpeace@earthlink.net, jason@ohloh.net
Subject: Re: SCSI vs SATA
In-Reply-To: <20070404131920.GA8549@alvh.no-ip.org>
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