Bug#548648: misdetects md RAID UUID

[Ian B. MacDonald]

After filing this bug report I discovered a workaround for my case described above, on current squeeze 

1. Fail and remove the raid member with the UUID issue (.. mdadm /dev/md0 -r /dev/sdb1)
2. Overwrite the partition with random data (dd if=/dev/random of=/dev/sdb1 ..)
3. Re-add the raid member (mdadm /dev/md0 -a /dev/sdb1)

Blkid now reports correct UUIDs for all devices, as do other tools.

 Perhaps something should be added to the mdadm raid1 add/create to ensure old partition UUIDs do not break udev..an interactive detect and wipe option comes to mind