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Date: Tue, 12 Mar 2002 07:58:06 +0100
From: Jens Axboe <axboe@suse.de>
To: Kurt Garloff <garloff@suse.de>, Douglas Gilbert <dougg@torque.net>,
        "Stephen C. Tweedie" <sct@redhat.com>,
        Jeremy Higdon <jeremy@classic.engr.sgi.com>,
        Daniel Phillips <phillips@bonn-fries.net>,
        James Bottomley <James.Bottomley@SteelEye.com>,
        Chris Mason <mason@suse.com>, linux-kernel@vger.kernel.org,
        linux-scsi@vger.kernel.org
Subject: Re: [PATCH] 2.4.x write barriers (updated for ext3)
Message-ID: <20020312065806.GX704@suse.de>
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On Mon, Mar 11 2002, Kurt Garloff wrote:
> disks (DASDs), Write-Once and Optical Memory devices. (Funny enough, the
> SCSI spec also lists SYNCHRONIZE_CACHE for CD-Rom devices

Hey, I use SYNCHRONIZE_CACHE in the packet writing stuff for CD-ROM's
all the time :-). Not all are read-only. In fact, Peter Osterlund
discovered that if you have pending writes on the CD-ROM it's a really
good idea to sync the cache prior to starting reads or they have a nasty
tendency to time out.

-- 
Jens Axboe

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