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(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>

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