Re: [CentOS] raid1 creation :: not large enough to join array

On Jan 16, 2010, at 10:27 AM, Adrian Sevcenco Adrian.Sevcenco@cern.ch wrote:

Hi! I have 2 identical hdd (1002FBYS) with the same firmware, etc .. really identical! when i try to add the second hdd to this raid1 array i have the message that /dev/sdb is not large enough to join array!! on the first hdd i have 100 mb unpartitioned at the end of disk (as i understood that mdadm put there some info...) Anyone, any idea what can be wrong? i already done this procees several times and this is first time i encounter this and i have no idea what can be the problem ..

Make sure the partitions are exactly the same, you can use sfdisk to copy the table from a to b.

-Ross