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Old 11-16-2009, 04:41 PM   #1
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mdadm create,, raid array is not clean

I do
mdadm --create /dev/md1 --level=1 --raid-disks=2 missing /dev/sdb1

and I get

md1: raid array is not clean -- starting background reconstruction

Why is it not clean?
Should I be worried?

The HD is not new it has been used in before in a raid array but has been repartitionated.
Old 11-16-2009, 05:16 PM   #2
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I wouldn't worry about it. But then again, someone who knows better than I probably will tell you if you should be worried.

I don't think you should be worried about it, simply because I got this message after a power failure had one of our servers (at work) just turn off (ungracefully). After the RAID reconstruction, the array should be fine.
Old 11-16-2009, 05:36 PM   #3
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Why is it not clean?
I'm guessing because mdadm sees the old raid data.
Should I be worried?


clean, create, mdadm

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