Wednesday, December 23, 2015

Mdadm Must Be Configured on Partition

Refer to my previous post Missing mdadm array after reboot, I would like to add on the reason why auto-scan does not work once system rebooted - it requires the RAID to be configured on a partition instead of the disks!

This is going to have problem:
mdadm --create --level=6 --raid-devices=5 /dev/md0 /dev/sd[b-f]
 and this would be correct, please take note of the digit at the end of line:
mdadm --create --level=6 --raid-devices=5 /dev/md0 /dev/sd[b-f]1

It means you must format all the disks with at least one partition, and building the RAID using the partition.

I  hope this would be helpful for novice users who trying to get the RAID run properly.

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