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From: Bruno Wolff III <bruno@wolff.to>
To: Shane Ambler <pgsql@Sheeky.Biz>
Cc: Jeff Davis <pgsql@j-davis.com>
Cc: Peter Kovacs <maxottovonstirlitz@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Carlos Moreno <moreno_pg@mochima.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Two hard drives --- what to do with them?
Date: Wed, 28 Feb 2007 21:31:12 -0600
Message-ID: <20070301033112.GB14102@wolff.to> (raw)
In-Reply-To: <45E3BC09.60100@Sheeky.Biz>
References: <1d4e0c10702231425ke37a732y36e241902fe0aa55@mail.gmail.com>
	<45DF94BF.6050904@3times25.net>
	<45E0A500.1010707@commandprompt.com>
	<45E104DD.3080600@mochima.com>
	<2055.1172375931@sss.pgh.pa.us>
	<b6e8f2e80702251411q5a27eb53re9c2a299b8e3880a@mail.gmail.com>
	<1172526666.10824.315.camel@dogma.v10.wvs>
	<b6e8f2e80702261611j598b1771g3dbcfc9bb1f9cdf2@mail.gmail.com>
	<1172535914.10824.327.camel@dogma.v10.wvs>
	<45E3BC09.60100@Sheeky.Biz>

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.



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