Server refuses to boot when Raid5 disk is disconnected - /root/ missing

Posted by Ronni on Server Fault See other posts from Server Fault or by Ronni
Published on 2012-03-13T08:18:14Z Indexed on 2012/03/21 5:31 UTC
Read the original article Hit count: 128

Filed under:

debian

|

raid

|

nas

I recently set up a NAS server running a Debian OS (6.0.4)

It contains 4 disks, 3 of them are in a Raid5 array, while the last one is used for the OS.

To simulate a disk-failure I unplugged one of the raid disks, which resulted in the OS being unable to boot.

It started the boot, recognized that md0 (the raid array) was running on 2/3 disks, and then threw a few errors.

It was unable to find the following directories:

/dev/root on /root,
/dev on /root/dev,
/sys on /root/sys,
/proc on /root/proc

It appears this happens regardless of which raid disk is removed. These directories are supposed to be on /dev/sdd my system disk.

Output from fstab and blkid : http://dl.dropbox.com/u/6017799/NASOutput.txt

If you need additional info, please let me know.

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