From: Kristian Peters <kristian.peters@korseby.net>
To: Jimmie Mayfield <mayfield+kernel@sackheads.org>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: 2.4.23 : timeouts and lost interrupts using IDE-SCSI
Date: Thu, 4 Dec 2003 17:09:12 +0100 [thread overview]
Message-ID: <20031204170912.6075f36e.kristian.peters@korseby.net> (raw)
In-Reply-To: <YImw.6Dc.5@gated-at.bofh.it>
Jimmie Mayfield <mayfield+kernel@sackheads.org> schrieb:
> Since upgrading from 2.4.20 to 2.4.23, I can no longer mount my ATAPI CDROM and
> CDR/W drives using IDE-SCSI. Attempts to mount those drives result in
> lost interrupts messages:
That is normal and intended. You should see some "dma disabled" messages in your kernel-log (unless if you haven't enabled "DMA only for disks"). ATAPI/cdrom does not work reliable with DMA on 2.4. I think Andre Hedrick has switched that off after 2.4.20.
If you really want ide-scsi with dma you should try 2.6.
This is how it should like:
SCSI subsystem driver Revision: 1.00
hdb: attached ide-scsi driver.
hdb: DMA disabled <------
hdd: attached ide-scsi driver.
hdd: DMA disabled <------
scsi0 : SCSI host adapter emulation for IDE ATAPI devices
Vendor: COMPAQ Model: CD-ROM LTN485 Rev: KQA4
Type: CD-ROM ANSI SCSI revision: 02
Vendor: HP Model: CD-Writer+ 9100b Rev: 1.06
Type: CD-ROM ANSI SCSI revision: 02
So you should disable that option in your config or if you prefer using hdparm try it with "-d0 /dev/cdrom".
*Kristian
next parent reply other threads:[~2003-12-04 16:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <YImw.6Dc.5@gated-at.bofh.it>
2003-12-04 16:09 ` Kristian Peters [this message]
2003-12-05 23:33 ` 2.4.23 : timeouts and lost interrupts using IDE-SCSI Daniel B.
2003-12-03 16:41 Jimmie Mayfield
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