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SubjectRe: [Bug #14622] Second IDE device not found
On 11/20/2009 04:29 AM, Zeno Davatz wrote:
> On Fri, Nov 20, 2009 at 9:41 AM, Jeff Garzik<> wrote:
>> On 11/20/2009 02:59 AM, Zeno Davatz wrote:
>>> On Thu, Nov 19, 2009 at 9:05 PM, David Miller<> wrote:
>>>> From: "Rafael J. Wysocki"<>
>>>> Date: Mon, 16 Nov 2009 23:37:47 +0100 (CET)
>>>>> This message has been generated automatically as a part of a report
>>>>> of recent regressions.
>>>>> The following bug entry is on the current list of known regressions
>>>>> from 2.6.31. Please verify if it still should be listed and let me know
>>>>> (either way).
>>>>> Bug-Entry :
>>>>> Subject : Second IDE device not found
>>>>> Submitter : Zeno Davatz<>
>>>>> Date : 2009-11-11 17:31 (6 days old)
>>>>> References :
>>>> We're going to need more information to diagnose this.
>>>> And linux-ide should have been at least CC:'d from the very
>>>> beginning.
>>>> From what I can discern the problem is introduced somewhere between
>>>> 2.6.27 and 2.6.31, you have a Serverworks CSB5 and primarily the issue
>>>> is that attaching or detaching your CD-ROM driver influences whether
>>>> both of your disks are properly detected. Correct?
>>>> You seem to have played around with using the IDE layer vs. the
>>>> ATA layer. Can you see any difference in behavior if you try
>>>> using just the IDE layer vs. just the ATA layer with the 2.6.31
>>>> kernel?
>>> Please see:
>>> and
>> Unfortunately, both of these photos only show that MD (block major 9) device
>> could not be found for root.
>> For either ATA or IDE, we would need to see full dmesg somehow -- perhaps
>> capturing serial console output? (Documentation/serial-console.txt)
> Ok, I appended
> console=ttyS1,9600 console=tty0
> to the kernel command line at lilo after choosing the kernel image and
> I get a ton of output. But how to I save the output to a file?

I use minicom and a null modem serial cable. One of minicom's commands
will capture everything sent to the serial port, to a file. Other
options are available. Googling for "linux serial console" found
several useful starting-point links.

The basic idea is to sent console output to a serial port, and then have
some method of reading and capturing the serial port's data.

Another alternative is netconsole (google for "linux netconsole"), which
permits output over the network.

>>> I makes no difference if I choose ATA or only IDE.
>>> I am also attaching you my Kernel .config
>>> I could also test with 2.6.32-rc8 (torvalds-git)
>>> I suggest you send me two .config that I can both test with
>> I bet libata fails because CONFIG_BLK_DEV_SD is not enabled. Probably want
>> to enable CONFIG_BLK_DEV_SR too, for libata CD-ROM support. I would be
>> interested to see your failing ATA config, with IDE disabled.
> I enabled CONFIG_BLK_DEV_SR. Do you want above test with or without

Well, this goes back to David's basic request: IDE-only or ATA-only.

You really, really, really should not to enable both at the same time.

If you are choosing ATA-only (libata), then you should disable
CONFIG_IDE and everything associated with CONFIG_IDE, including

libata will want something like
CONFIG_ATA_VERBOSE_ERROR <-- optional, but helpful

CONFIG_BLK_DEV_SR <-- required only for CD-ROM support



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