I have a RHEL 6.5 box in which I have recently added two partitions to the a raid 1. It took the the disks without any incidents but I am not able to resize the raid itself. The output of cat /proc/mdstat is:
md0 : active raid1 sdc1[2] sde1[4] sdd1[3] sda1[0] sdb1[1]
102388 blocks super 1.0 [5/5] [UUUUU]
Doing mdmadm --detail /dev/md0 gives:
/dev/md0: Version : 1.0 Creation Time : Wed Sep 7 11:53:07 2011 Raid Level : raid1 Array Size : 102388 (100.01 MiB 104.85 MB) Used Dev Size : 102388 (100.01 MiB 104.85 MB) Raid Devices : 5 Total Devices : 5 Persistence : Superblock is persistent
Update Time : Tue Feb 4 09:08:51 2014 State : clean Active Devices : 5 Working Devices : 5 Failed Devices : 0 Spare Devices : 0 Name : ... UUID : 8be07299:879eb666:ac4b1cde:3c2d9b97 Events : 424 Number Major Minor RaidDevice State 0 8 1 0 active sync /dev/sda1 1 8 17 1 active sync /dev/sdb1 2 8 33 2 active sync /dev/sdc1 4 8 65 3 active sync /dev/sde1 3 8 49 4 active sync /dev/sdd1
So it seems to me that all 4 disks are mirrors. When I try to resize the array I get:
# mdadm --grow /dev/md0 --size=max
mdadm: component size of /dev/md0 unchanged at 102388K
How can I get this array to grow?