Ubuntu server boot degraded raid

Posted by beacon_bonanza on Server Fault See other posts from Server Fault or by beacon_bonanza
Published on 2012-08-30T09:05:20Z Indexed on 2012/08/30 9:40 UTC
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Filed under:

ubuntu

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software-raid

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raid1

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degraded

I've installed Ubuntu 12.04.1 in a new server and set up the 4 hard drives with 3 RAID 1 devices, the configuration is such that the first two drives have md0 (swap space) and md1 (/) with the third and fourth drives having md2 (/var).

I've been testing the operation under a drive failure and found that the system boots fine if I remove disk two but if I remove disk one then the system gets to grub and then just restarts. I'm confused as to why grub appears to be loading properly from disk two but then the boot fails.

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