From: Mark Lord <liml@rtr.ca>
To: Tejun Heo <htejun@gmail.com>
Cc: William Thompson <wt@electro-mechanical.com>,
linux-kernel@vger.kernel.org,
IDE/ATA development list <linux-ide@vger.kernel.org>,
albertcc@tw.ibm.com
Subject: Re: 2.6.20 libata cdrom
Date: Tue, 01 May 2007 08:55:25 -0400 [thread overview]
Message-ID: <463738BD.2090308@rtr.ca> (raw)
In-Reply-To: <46373873.6060704@rtr.ca>
Mark Lord wrote:
> Tejun Heo wrote:
> ..
>>>>> scsi1 : ata_piix
>>>>> ata2.00: failed to IDENTIFY (I/O error, err_mask=0x1)
> ..
>> The err_mask is AC_ERR_DEV indicating that the device raised aborted the
>> IDENTIFY command. I wonder what's going on.
>>
>> Can you change "#undef ATA_DEBUG" in include/linux/libata.h to "#define
>> ATA_DEBUG" and report the resulting dmesg? There will be a LOT of
>> messages so you probably want to increase printk buffer size and detach
>> other devices if possible. It would be best if your root device isn't
>> driven by libata so that you can just insert the module and store the
>> resulting dmesg.
>
> If the command really was "IDENTIFY", then of course it failed.
> This is an ATAPI device, and it wants "PACKET_IDENTIFY".
>
> Maybe libata somehow thinks it's ATA rather than ATAPI?
And this is the second one today where it would be very useful
to see a tf dump. It's time to add one to that code patch, methinks.
next prev parent reply other threads:[~2007-05-01 12:55 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-27 17:52 2.6.20 libata cdrom William Thompson
2007-04-30 10:22 ` Tejun Heo
2007-04-30 20:21 ` William Thompson
2007-05-01 4:32 ` Tejun Heo
2007-05-01 12:17 ` William Thompson
2007-05-01 13:04 ` Mark Lord
2007-05-01 13:18 ` William Thompson
2007-05-01 13:24 ` Mark Lord
2007-05-01 13:36 ` Alan Cox
2007-05-01 13:40 ` Tejun Heo
2007-05-01 13:51 ` Mark Lord
2007-05-01 14:19 ` Jeff Garzik
2007-05-01 14:23 ` Mark Lord
2007-05-01 14:28 ` Alan Cox
2007-05-01 17:21 ` William Thompson
2007-05-07 16:42 ` [PATCH] libata: fallback to the other IDENTIFY on device error Tejun Heo
2007-05-07 17:34 ` William Thompson
2007-05-07 18:05 ` William Thompson
2007-05-08 8:02 ` Tejun Heo
2007-05-10 0:08 ` Jeff Garzik
2007-05-11 12:35 ` [PATCH] libata: fallback to the other IDENTIFY on device error, take#2 Tejun Heo
2007-05-11 22:10 ` Jeff Garzik
2007-05-11 22:10 ` Jeff Garzik
2007-05-13 12:57 ` Tejun Heo
2007-05-13 16:13 ` Dave Jones
2007-05-13 17:50 ` Tejun Heo
2007-05-13 18:13 ` Dave Jones
2007-05-01 18:11 ` 2.6.20 libata cdrom Bartlomiej Zolnierkiewicz
2007-05-01 12:54 ` Mark Lord
2007-05-01 12:55 ` Mark Lord [this message]
2007-05-01 13:32 ` Tejun Heo
2007-05-01 13:41 ` Mark Lord
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