From: Jeff Garzik <jeff@garzik.org>
To: dougg@torque.net
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>,
Tejun Heo <htejun@gmail.com>, Mark Lord <liml@rtr.ca>,
Linux IDE <linux-ide@vger.kernel.org>,
linux-scsi@vger.kernel.org
Subject: Re: [PATCH] RESEND: SCSI, libata: add support for ATA_16 commands to libata ATAPI devices
Date: Thu, 01 Feb 2007 15:30:54 -0500 [thread overview]
Message-ID: <45C24DFE.80202@garzik.org> (raw)
In-Reply-To: <45C24BC5.6060305@torque.net>
Douglas Gilbert wrote:
> It is the ATAPI _transport_ that has the 12 byte cdb
> limit *** (at least according to MMC-5 rev Annex A;
> is S-ATAPI any better?).
Then the spec is wrong.
1) The transport does not limit the CDB size.
2) The ATAPI device limits the CDB size, and it exports this limit via
IDENTIFY PACKET DEVICE. It can be either 12 or 16 bytes.
3) In some rare cases, the host controller silicon may limit CDB size.
Jeff
next prev parent reply other threads:[~2007-02-01 20:30 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-03 0:35 [PATCH] SCSI, libata: add support for ATA_16 commands to libata ATAPI devices Mark Lord
2007-01-03 1:40 ` James Bottomley
2007-01-03 5:42 ` Mark Lord
2007-01-03 15:31 ` James Bottomley
2007-01-03 15:45 ` Jeff Garzik
2007-01-03 15:57 ` James Bottomley
2007-01-03 17:58 ` Mark Lord
2007-01-03 19:39 ` Douglas Gilbert
2007-01-03 21:41 ` James Bottomley
2007-01-03 23:57 ` Mark Lord
2007-01-04 15:09 ` Jens Axboe
2007-01-04 15:29 ` Mark Lord
2007-01-04 15:51 ` Jens Axboe
2007-01-08 5:00 ` Luben Tuikov
[not found] ` <200701311346.26644.liml@rtr.ca>
2007-02-01 0:33 ` [PATCH] RESEND: " Tejun Heo
2007-02-01 0:42 ` Mark Lord
2007-02-01 0:48 ` James Bottomley
2007-02-01 0:53 ` Mark Lord
2007-02-01 0:48 ` Tejun Heo
2007-02-01 1:01 ` Mark Lord
2007-02-01 8:30 ` Jeff Garzik
2007-02-01 8:28 ` Jeff Garzik
2007-02-01 8:43 ` Tejun Heo
2007-02-01 9:54 ` Jeff Garzik
2007-02-01 15:09 ` James Bottomley
2007-02-01 15:15 ` Jeff Garzik
2007-02-01 20:21 ` Douglas Gilbert
2007-02-01 20:30 ` Jeff Garzik [this message]
2007-02-02 9:11 ` Christoph Hellwig
2007-02-01 8:26 ` Jeff Garzik
2007-02-01 8:35 ` Tejun Heo
2007-02-01 9:52 ` Jeff Garzik
2007-02-01 0:44 ` James Bottomley
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