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Date: Wed, 28 Feb 2007 21:31:12 -0600
From: Bruno Wolff III <bruno@wolff.to>
To: Shane Ambler <pgsql@Sheeky.Biz>
Cc: Jeff Davis <pgsql@j-davis.com>,
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	Carlos Moreno <moreno_pg@mochima.com>, pgsql-performance@postgresql.org
Subject: Re: Two hard drives --- what to do with them?
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On Tue, Feb 27, 2007 at 15:35:13 +1030,
  Shane Ambler <pgsql@Sheeky.Biz> wrote:
> 
> From all that I have heard this is another advantage of SCSI disks - 
> they honor these settings as you would expect - many IDE/SATA disks 
> often say "sure I'll disable the cache" but continue to use it or don't 
> retain the setting after restart.

It is easy enough to tests if your disk lie about disabling the cache.
I doubt that it is all that common for modern disks to do that.