Apologies for raising this topic again, but I can't seem to find
anything googling, and man mdadm doesn't also give me a clue. Which
kernel version is needed to grow a near-2 RAID 10 array?
I'm currently running kernel 3.13.0 with mdadm 3.2.5. But I could also
use a live CD with a newer kernel, if needed.
I have replaced the 4 disks here with larger ones (2TB drives -> 4 TB
drives), and this is what the array currently looks like:
# mdadm --detail /dev/md0
/dev/md0:
Version : 1.2
Creation Time : Sat Aug 20 08:15:07 2011
Raid Level : raid10
Array Size : 3906764800 (3725.78 GiB 4000.53 GB)
Used Dev Size : 1953382400 (1862.89 GiB 2000.26 GB)
Raid Devices : 4
Total Devices : 4
Persistence : Superblock is persistent
Update Time : Thu Dec 11 08:31:15 2014
State : clean
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : near=2
Chunk Size : 512K
Name : alpha:0 (local to host alpha)
UUID : 8199e640:58fc3a04:99b52fe6:80a1574d
Events : 918971
Number Major Minor RaidDevice State
6 8 1 0 active sync /dev/sda1
5 8 33 1 active sync /dev/sdc1
7 8 17 2 active sync /dev/sdb1
4 8 49 3 active sync /dev/sdd1
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