Here are some relevant data of the test setup that may be usefull:
[root@test]# cat /etc/raidtab
raiddev /dev/md0
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
chunk-size 4
persistent-superblock 1
device /dev/sda2
raid-disk 0
device /dev/sdb2
raid-disk 1
I think that you must replace: nr-raid-disks 2 with nr-raid-disks 3 Plus, the correspinding entry: device /dev/sdb3 raid-disk 2
Else, the third drive isn't recognized as part of the md array. Probably, you must restart the array (only first time). You may want to use mdadm instead of raidtools.
Modified config file, umounted and stoped raid, restarted raid, hotadded the disk, still the same results :(.
Any other ideeas ??
Mircea
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