[ale] SW RAID install problem - can't find root on raid at boot time

[Jeff Hubbs]

>From the original message:

"* /dev/sd[ab][23] are all of partition type fd."


Christopher Fowler wrote:
> Are the partition types 'fd' ?  "Raid Auto-detect"?
>
>
> On Tue, 2006-08-29 at 09:46 -0400, Jeff Hubbs wrote:
>   
>> Having all manner of trouble with this.
>>
>> Two SATA drives; onboard RAID disabled in favor of SW RAID:
>>
>>   ptn |   1   |   2   |   3   |
>>  disk ------------------------
>>   sda | /boot |  md1  |  md2  |
>>   sdb | spare |  md1  |  md2  |
>>
>> The goal here is to mount /dev/md1 at boot.
>>
>> At boot, I get:
>>
>>   md: autodetecting raid arrays
>>   md: autorun...
>>   md: ...autorun done
>>   VFS: cannot open root device "md1" or unknown-device(0,0)
>>   please append a correct "root=" boot option
>>   Kernel panic - not syncing: vfs : unable to mount root fs on
>> unknown-block(0,0)
>>
>> I have been using http://tinyurl.com/mauwd for guidance.  I am not now
>> dealing with LVM (that will involve /dev/md2, after I get this machine
>> booting on its own.
>>
>> Let me try to cover the more obvious things:
>>   * SATA, the SATA chipset in question, device mapper support, and RAID
>> 1 are all compiled into the kernel.
>>   * /etc/mdadm.conf looks like
>>
>>         DEVICE /dev/sd[ab][23]
>>         ARRAY /dev/md2 level=raid1 num-devices=2
>> UUID=833313e0:55a9f505:b67e7c38:af37019a
>>         ARRAY /dev/md1 level=raid1 num-devices=2
>> UUID=b67bd189:933757ef:ef6dff61:50ad811a
>>
>>     (Note: the two ARRAY lines were generated with mdadm --detail --scan
>> when booted to a livecd with
>>      the RAID volumes up and running)
>>   * /dev/sd[ab][23] are all of partition type fd.
>>   * /dev/md1 and /dev/md2 are fundamentally sound; I can boot to a
>> LiveCD, modprobe raid1,
>>     mdadm --assemble, and mount them right up with no problem.
>>
>> I made a point of not being module-dependent at boot.  I have no initrd,
>> and the doc I linked to above likewise has no initrd. 
>>
>> Anything here I've missed?
>>
>> - Jeff
>> _______________________________________________
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>> Ale at ale.org
>> http://www.ale.org/mailman/listinfo/ale
>>     
>
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