Re: Problem booting RAID1/mdadm system when one disk is unplugged



On Fri, 1 Sep 2006, James Brown wrote:

All,

I have already posted this question to gmane.linux.raid, but would really appreciate some help from a Debian perspective please...

My System has 2x120GB IDE disks with the an up-to-date Sarge install, running kernel 2.6.8-3 and configured for mirroring.

When I tested booting my system, I found:

a) A kernel panic unless both disks are plugged in.
b) One disk removes from the array each reboot.

The relevant logs are on this thread:
http://article.gmane.org/gmane.linux.raid/13033/match=newbie+kernel+panic+raid1

I was advised this was a problem with my initrd because it didn't contain a mdadm.conf file and presumably that I should

Unfortunately, some friends of mine do not agree that my initrd is the problem because they point out that I can still boot when two disks are present. What do people here think?

Thanks in advance

James.


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1) You do not need an initrd at all.
2) I would make sure you are booting from the /dev/md* partition.
3) You must have a /boot on a /dev/md partition.
4) You need LILO installed with the special raid option in the config.
5) I have done this and tested by pulling each HDD out and it working
successfully with Debian + 2x74GB raptors.

Justin.


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