linux-kernel - Re: Drives missing at boot

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Date:	Sat, 3 Jul 2010 09:06:33 -0700
From:	Mark Knecht <markknecht@...il.com>
To:	Tejun Heo <tj@...nel.org>
Cc:	Linux Kernel List <linux-kernel@...r.kernel.org>,
	"linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>
Subject: Re: Drives missing at boot

On Sat, Jul 3, 2010 at 9:01 AM, Tejun Heo <tj@...nel.org> wrote:
> (cc'ing linux-ide)
>
> On 07/02/2010 07:56 PM, Mark Knecht wrote:
>> Hi,
>>    I have a newish machine - maybe 3 months old - which unreliably
>> finds its disk drives at each boot. Probably 40% of the time booting 1
>> or more drives will be missing.
>>
>>    So far I've been unable to determine what might be wrong. Sometimes
>> it finds all 5 drives, sometimes only 4 or 3 drives. It's not always
>> the same drives that are missing. Shown below are two successive warm
>> boots. The machien had been running with all 5 drives working. The
>> first time through it missed both /dev/sdd and /dev/sde while the very
>> next time it found all 5 drives. Each of the 5 drives has been missing
>> one or more times at different boots. (I.e. - it's not always drive
>> sdd for instance.)
>>
>>    Every time I boot the AMI BIOS screen says all 5 drives are there.
>> I have found that if I drop into BIOS before going to grub that
>> selecting each drive one at a time and reading through it's setup
>> seems to make the boot more reliable, but not 100%. Probably 80%
>> reliable.
>>
>>    I don't know what info is required to look at this. I'm running the
>> newest Gentoo kernel but it's been happening with all kernels I've
>> tried since I built the machine. I'm attaching the kernel config as
>> well as dmesg from the last boot which had all the drives. The only
>> difference in dmesg when the drives don't show up (that I've spotted)
>> is that the missing drive just isn't in dmesg. (I.e. no error messages
>> that I could spot.)
>>
>>    Let me know what I might try or what other info you might want. The
>> motherboard is an Asus Rampage II Extreme with an i7-980x 6 core/12
>> thread processor. sda, sdb & sdc are part of a RAID1, sdd & sde are
>> part of a RAID0.
>
> Can you please *attach* full logs of a successful boot and several
> failing boots?
>
> Thanks.
>
> --
> tejun
>

Certainly? Which logs? dmesg or something else?

Thanks,
Mark
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