Hi,
I am trying to add a disk to a Linear Raid which was created with 2
disks.
We use linux-2.6.18 and mdadm-2.6.4.
I guess these support the above mentioned disk addition.
But I get the error quoted below.
Could you pls guide me?
Observations
------------
[root@NAS00226b1755a0 ~]# mdadm /dev/md0 --grow -n 3 /dev/sata3
mdadm: --size, --raiddisks, and --add are exclusing in --grow mode
[root@NAS00226b1755a0 ~]#
[root@NAS00226b1755a0 ~]#
[root@NAS00226b1755a0 ~]# mdadm /dev/md0 --grow -n 3
mdadm: linear array /dev/md0 cannot be reshaped.
[root@NAS00226b1755a0 ~]#
[root@NAS00226b1755a0 ~]#
[root@NAS00226b1755a0 ~]# mdadm /dev/md0 --grow --add /dev/sata3
mdadm: Cannot add new disk to this array
[root@NAS00226b1755a0 ~]#
[root@NAS00226b1755a0 ~]#
[root@NAS00226b1755a0 ~]# mdadm /dev/md0 --add /dev/sata3
mdadm: add new device failed for /dev/sata3 as 2: No space left on
device
[root@NAS00226b1755a0 ~]#
[root@NAS00226b1755a0 ~]#
[root@NAS00226b1755a0 ~]# mdadm /dev/md0 --grow -n 3 --add /dev/sata3
mdadm: --size, --raiddisks, and --add are exclusing in --grow mode
[root@NAS00226b1755a0 ~]#
[root@NAS00226b1755a0 ~]#
[root@NAS00226b1755a0 ~]# cat /proc/mdstat
Personalities : [linear] [raid0] [raid1] [raid10] [raid6] [raid5]
[raid4]
md0 : active linear sdb[1] sda[0]
444265856 blocks super 1.2 32k rounding
unused devices: <none>
[root@NAS00226b1755a0 ~]# mdadm -D /dev/md0
/dev/md0:
Version : 01.02.03
Creation Time : Wed Dec 9 03:02:50 2009
Raid Level : linear
Array Size : 444265856 (423.68 GiB 454.93 GB)
Raid Devices : 2
Total Devices : 2
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Wed Dec 9 03:02:50 2009
State : clean
Active Devices : 2
Working Devices : 2
Failed Devices : 0
Spare Devices : 0
Rounding : 32K
Name : 0
UUID : 041dce1e:adafc8da:525455fe:5a9d950f
Events : 0
Number Major Minor RaidDevice State
0 8 0 0 active sync /dev/sata1
1 8 16 1 active sync /dev/sata2
Thanks,
Senthil M
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