linux-kernel - Re: [patch 4/6] ps3: Disk Storage Driver

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Message-ID: <20070619081546.GA25336@lst.de>
Date:	Tue, 19 Jun 2007 10:15:46 +0200
From:	Christoph Hellwig <hch@....de>
To:	David Miller <davem@...emloft.net>
Cc:	hch@....de, James.Bottomley@...elEye.com, axboe@...nel.dk,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linuxppc-dev@...abs.org, paulus@...ba.org,
	Geert.Uytterhoeven@...ycom.com, dwmw2@...radead.org,
	alan@...rguk.ukuu.org.uk
Subject: Re: [patch 4/6] ps3: Disk Storage Driver

On Mon, Jun 18, 2007 at 11:07:31PM -0700, David Miller wrote:
> The main disk I/O block read and write is done using descriptors
> sent to the disk server.  SCSI pass-through is provided (optionally)
> so that disk analysis tools can do things like MODE_SENSE on the
> disk.

SG_IO can easily be implemented for block devices.  See cciss in
current mainline for an example.
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