Do I have to worry about "error: superfluous RAID member"?

Posted by 0xC0000022L on Ask Ubuntu See other posts from Ask Ubuntu or by 0xC0000022L
Published on 2012-05-11T23:08:31Z Indexed on 2014/05/30 9:38 UTC
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When running update-grub on the newly installed Ubuntu 12.04 with an older software RAID (md), I get:

error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
Generating grub.cfg ...
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
Found linux image: /boot/vmlinuz-3.2.0-24-generic
Found initrd image: /boot/initrd.img-3.2.0-24-generic
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
Found linux image: /boot/vmlinuz-3.2.0-23-generic
Found initrd image: /boot/initrd.img-3.2.0-23-generic
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
Found memtest86+ image: /boot/memtest86+.bin
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
error: superfluous RAID member (5 found).
Found Debian GNU/Linux (5.0.9) on /dev/sdb1
Found Debian GNU/Linux (5.0.9) on /dev/sdc1
done

I would be less worried if the message would say warning: ..., but since it says error: ... I'm wondering what the problem is.

# cat /proc/mdstat
Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10]
md2 : active raid1 sdc1[1] sdb1[0]
      48829440 blocks [2/2] [UU]

md3 : active raid1 sdc2[1] sdb2[0]
      263739008 blocks [2/2] [UU]

md1 : active raid5 sdg1[3] sdf1[2] sde1[1] sdh1[0] sdi1[4] sdd1[5](S)
      1250274304 blocks level 5, 64k chunk, algorithm 2 [5/5] [UUUUU]

unused devices: <none>

Do I have to worry or is this harmless?

btw: disregard the mentioning of Debian 5.0.9, that was the previously installed system and is going to be overwritten. It's on /dev/md2 actually.

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