(parted) mkpart primary 0 1001G
(parted) set 1 raid on (parted) print Model: ATA Hitachi HDS72101 (scsi) Disk /dev/sdb: 1000GB Sector size (logical/physical): 512B/512B Partition Table: gpt Number Start End Size File system Name Flags 1 17.4kB 1000GB 1000GB primary raid
# mdadm -C /dev/md0 -l5 -n3 -f /dev/sdb1 /dev/sdc1 /dev/sdd1 mdadm: array /dev/md0 started.
# mdadm -D /dev/md0
/dev/md0:
Version : 0.90
Creation Time : Tue May 18 22:21:27 2010
Raid Level : raid5
Array Size : 1953524864 (1863.03 GiB 2000.41 GB)
Used Dev Size : 976762432 (931.51 GiB 1000.20 GB)
Raid Devices : 3
Total Devices : 3
Preferred Minor : 0
Persistence : Superblock is persistent
Update Time : Tue May 18 22:21:27 2010
State : clean, resyncing
Active Devices : 3
Working Devices : 3
Failed Devices : 0
Spare Devices : 0
Layout : left-symmetric
Chunk Size : 64K
Rebuild Status : 1% complete
UUID : 04129d22:90196aa6:f47ebf50:9603f10c
Events : 0.1
Number Major Minor RaidDevice State
0 8 17 0 active sync /dev/sdb1
1 8 33 1 active sync /dev/sdc1
2 8 49 2 active sync /dev/sdd1
$ cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 sdd1[2] sdc1[1] sdb1[0]
1953524864 blocks level 5, 64k chunk, algorithm 2 [3/3] [UUU]
[================>....] resync = 81.0% (791761668/976762432) finish=34.1min speed=90386K/sec
unused devices: <none>
# cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md0 : active raid5 sdd1[2] sdc1[1] sdb1[0]
1953524864 blocks level 5, 64k chunk, algorithm 2 [3/3] [UUU]
unused devices: <none>
Counter: 859,
today: 2,
yesterday: 1