From: Jens Axboe <axboe@suse.de>
To: "J.A. Magallon" <jamagallon@able.es>
Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>,
Lista Linux-Kernel <linux-kernel@vger.kernel.org>
Subject: Re: cdrecord dev=ATA cannont scanbus as non-root
Date: Tue, 30 Nov 2004 08:16:39 +0100 [thread overview]
Message-ID: <20041130071638.GC10450@suse.de> (raw)
In-Reply-To: <1101765555l.13519l.1l@werewolf.able.es>
On Mon, Nov 29 2004, J.A. Magallon wrote:
> dev=ATAPI uses ide-scsi interface, through /dev/sgX. And:
>
> > scsibus: -1 target: -1 lun: -1
> > Warning: Using ATA Packet interface.
> > Warning: The related Linux kernel interface code seems to be unmaintained.
> > Warning: There is absolutely NO DMA, operations thus are slow.
>
> dev=ATA uses direct IDE burning. Try that as root. In my box, as root:
Oh no, not this again... Please check the facts: the ATAPI method uses
the SG_IO ioctl, which is direct-to-device. It does _not_ go through
/dev/sgX, unless you actually give /dev/sgX as the device name. It has
nothing to do with ide-scsi. Period.
ATA uses CDROM_SEND_PACKET. This has nothing to do with direct IDE
burning, it's a crippled interface from the CDROM layer that should not
be used for anything. scsi-linux-ata.c should be ripped from the
cdrecord sources, or at least cdrecord should _never_ select that
transport for 2.6 kernels. For 2.4 you are far better off using
ide-scsi.
> The scan through ATA lasts much less than with ATAPI, and you can burn with
> dev=ATA:1,0,0 or dev=/dev/burner, which is the new recommended way.
No! ATAPI is the recommended way.
--
Jens Axboe
next prev parent reply other threads:[~2004-11-30 7:17 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-29 21:33 cdrecord dev=ATA cannont scanbus as non-root J.A. Magallon
2004-11-29 21:50 ` Jan Engelhardt
2004-11-29 21:59 ` J.A. Magallon
2004-11-30 6:51 ` Jan Engelhardt
2004-11-30 7:16 ` Jens Axboe [this message]
2004-11-30 16:29 ` J.A. Magallon
2004-11-30 17:12 ` J.A. Magallon
2004-11-30 17:37 ` Jan Engelhardt
2004-11-30 17:49 ` J.A. Magallon
2004-11-30 17:56 ` Jan Engelhardt
2004-11-30 18:29 ` J.A. Magallon
2004-12-01 21:16 ` cdrecord dev=ATA cannont scanbus as non-root [u] Martin Schlemmer [c]
2004-12-02 16:23 ` Radoslaw Szkodzinski
2004-12-02 21:50 ` Martin Schlemmer [c]
2004-12-03 7:35 ` Jan Engelhardt
2004-12-03 11:51 ` Rahul Karnik
2004-12-03 12:06 ` Jan Engelhardt
2004-12-03 12:10 ` Jens Axboe
2004-12-01 21:56 ` cdrecord dev=ATA cannont scanbus as non-root Markus Plail
2004-12-02 8:07 ` Jens Axboe
2004-12-02 12:51 ` J.A. Magallon
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