Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I've installed a RAID5 using mdadm yesterday. Since then it has been rebuilding.

I just restarted my computer and it started rebuilding the RAID from scratch. (Had 60% before.) Is this normal or are there any settings missing?

The only thing I did besides creating the RAID, was adding this line to /etc/mdadm/mdadm.conf:

ARRAY /dev/md0 level=raid5 num-devices=3 UUID=bce3de1f:...:466da02f
share|improve this question
up vote 5 down vote accepted

Yes, that's normal if building the RAID wasn't done yet.

RAID 5 needs at least n-1 disks to be "built" completely (where "n" is the total number of disks in the RAID). As this was the first time you were (re)building them, all of them were only built for 60%, and none of them were marked as "complete".

share|improve this answer
Thanks. That was fast. – Georg Schölly Oct 25 '10 at 20:22

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.