Re: corrupt raid 5

On 1/4/06, Lorac Thelmwood [off-list ref] wrote:

failed to RUN_ARRAY /dev/md1: Invalid argument


I don't think it will start even whe the reconstruction is complete to
due to that bad superblock

On 1/4/06, John Stoffel [off-list ref] wrote:

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"Lorac" == Lorac Thelmwood [off-list ref] writes:

Lorac> First I can't start the array because it complains about a bad
Lorac> superblock.

Have you tried forcing the start of the array with the --force flag?
Something like this:

        mdadm -A --run /dev/md1

Please give the output of the command.

Lorac> What's the output of 'cat /proc/mdstat' and 'mdadm

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--detail /dev/md?' where ? is the number of your raid 5 array?

Lorac> debian:~# cat /proc/mdstat
Lorac> Personalities : [raid1] [raid5]
Lorac> md1 : inactive hdh1[4] hdc1[0] hdg1[3] hdf1[2] hde1[1]
Lorac>       976791680 blocks

This is the key info, the array is assembled, but it hasn't been
started properly, probably because of the missing disk.  Try the --run
args as above and see what it does for you.

See how it says 'inactive', this means you need to get it running
first.

Good luck,
John
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