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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Jeff Garzik <jgarzik@pobox.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [BK PATCHES] add ata scsi driver
Date: 27 May 2003 01:22:56 +0100	[thread overview]
Message-ID: <1053994974.17129.32.camel@dhcp22.swansea.linux.org.uk> (raw)
In-Reply-To: <Pine.LNX.4.44.0305252236400.10183-100000@home.transmeta.com>

On Llu, 2003-05-26 at 06:40, Linus Torvalds wrote:
> > And for specifically Intel SATA, drivers/ide flat out doesn't work (even 
> > though it claims to).
> 
> Well, I don't think it claimed to, until today. Still doesn't work?

Even if it did it would at best be a toy. The core IDE layer doesn't
handle SCSI errors properly (needed for ATAPI) except using ide-scsi. It
doesn't handle hot plugging of devices, it doesn't handle tagged
queueing very well, it hasn't the slightest idea about multipath (SATA2
can do), it doesn't know a lot of other things either.

SATA and especially SATA2 is basically SCSI with some slightly odd ways
of issuing READ10/WRITE10 to disk devices. A "native" driver would
basically be a copy of most of drivers/scsi.

I actually think thats a positive thing. It means 2.5 drivers/scsi is
now very close to being the "native queueing driver" with some
additional default plugins for doing scsi scanning, scsi error recovery 
and a few other scsi bits.



  parent reply	other threads:[~2003-05-27  1:13 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-05-26  4:58 [BK PATCHES] add ata scsi driver Jeff Garzik
2003-05-26  5:15 ` Linus Torvalds
2003-05-26  5:30   ` Jeff Garzik
2003-05-26  5:36     ` Jeff Garzik
2003-05-26  5:42       ` Linus Torvalds
2003-05-26  6:01         ` Jeff Garzik
2003-05-26 16:56           ` Linus Torvalds
2003-05-26 17:47             ` Jeff Garzik
2003-05-26 20:09               ` Linus Torvalds
2003-05-27  0:29                 ` Alan Cox
2003-05-27  6:07                 ` Jeff Garzik
2003-05-27  6:30                   ` Linus Torvalds
2003-05-27  6:51                     ` Linus Torvalds
2003-05-27  7:29                       ` Jeff Garzik
2003-05-26  5:40     ` Linus Torvalds
2003-05-26  5:53       ` Jeff Garzik
2003-05-26  6:21         ` Jeff Garzik
2003-05-26 16:57           ` Linus Torvalds
2003-05-26 17:24             ` Jens Axboe
2003-05-26 17:54               ` Jeff Garzik
2003-05-26 17:59               ` Jeff Garzik
2003-05-26 18:11                 ` Jens Axboe
2003-05-27  0:22       ` Alan Cox [this message]
2003-05-27  4:15         ` Linus Torvalds
2003-05-26 10:32     ` Bartlomiej Zolnierkiewicz
2003-05-26 11:13       ` Jeff Garzik
2003-05-26 11:37         ` Bartlomiej Zolnierkiewicz
2003-05-26  5:59 ` Benjamin Herrenschmidt
2003-05-26  6:03   ` Jeff Garzik
2003-06-02  9:46 ` Andre Hedrick
2003-06-02 13:56   ` Alan Cox
2003-05-26 18:12 James Bottomley
2003-05-26 18:18 ` Jens Axboe
2003-05-26 18:47   ` James Bottomley
2003-05-26 19:07     ` Jens Axboe
2003-05-26 19:17       ` James Bottomley
2003-05-26 19:33         ` Jens Axboe
2003-05-27 12:39           ` Jens Axboe
2003-05-27 14:26             ` James Bottomley
2003-05-27 17:16               ` Jens Axboe
2003-05-27 18:09                 ` James Bottomley
2003-05-27 18:21                   ` Jens Axboe
2003-05-27 18:30                     ` James Bottomley
2003-05-26 20:27         ` Linus Torvalds
2003-05-26 20:36           ` James Bottomley
2003-05-26 20:45             ` Linus Torvalds
2003-05-26 20:51               ` Jens Axboe
2003-05-26 20:56               ` James Bottomley
2003-05-26 20:38           ` Jens Axboe
2003-05-26 20:49             ` Linus Torvalds
2003-05-26 20:57               ` Jens Axboe
2003-05-26 21:34                 ` Linus Torvalds
2003-05-26 23:58                   ` Nick Piggin
2003-05-27  0:09                     ` Linus Torvalds
2003-05-27  0:49                       ` Nick Piggin
2003-05-27  0:16                   ` Alan Cox
2003-05-27  6:54                   ` Jens Axboe
2003-05-27 14:20                     ` James Bottomley
2003-05-27 14:36                     ` Linus Torvalds
2003-05-27 14:59                       ` James Bottomley
2003-05-27 15:21                         ` Jeff Garzik
2003-05-27 15:38                           ` James Bottomley
2003-05-27 15:50                             ` Jeff Garzik
2003-05-27 16:00                               ` James Bottomley
2003-05-27 16:16                                 ` Jeff Garzik
2003-05-28  9:35                                   ` Christoph Hellwig
2003-05-28 10:50                           ` Lincoln Dale
2003-05-27 19:43                       ` Jens Axboe

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