Linux RAID-10, какие диски в саб зеркалах?

Имеем следующую конфигурацию:

cat /proc/mdstat
Personalities : [raid10] [raid1] [raid0] [raid6] [raid5] [raid4]
md0 : active raid1 sdd1[3] sdc1[2] sdb1[1] sda1[0]
2102464 blocks [4/4] [UUUU]

md1 : active raid1 sdd2[3] sdc2[2] sdb2[1] sda2[0]
264960 blocks [4/4] [UUUU]

md2 : active raid10 sdd3[3] sdc3[2] sdb3[1] sda3[0]
1460404736 blocks 64K chunks 2 near-copies [4/4] [UUUU]
[=>...................] resync = 5.9% (86553984/1460404736) finish=324.5min speed=70551K/sec

unused devices:

mdadm --detail /dev/md2
/dev/md2:
Version : 0.90
Creation Time : Sat Jan 15 15:57:05 2011
Raid Level : raid10
Array Size : 1460404736 (1392.75 GiB 1495.45 GB)
Used Dev Size : 730202368 (696.38 GiB 747.73 GB)
Raid Devices : 4
Total Devices : 4
Preferred Minor : 2
Persistence : Superblock is persistent

Update Time : Sat Jan 15 16:09:38 2011
State : active, resyncing
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0

Layout : near=2
Chunk Size : 64K

Rebuild Status : 6% complete

UUID : 156658c3:7e3be92e:776c2c25:004bd7b2
Events : 0.7

Number Major Minor RaidDevice State
0 8 3 0 active sync /dev/sda3
1 8 19 1 active sync /dev/sdb3
2 8 35 2 active sync /dev/sdc3
3 8 51 3 active sync /dev/sdd3

И в упор не понятно, какие диски зазеркалены между собой, а какие нет.