Administrace komentářů

opensuse64:~ # mkdir test_raid
opensuse64:~ # cd test_raid/
opensuse64:~/test_raid # dd if=/dev/zero of=disk1 bs=10M count=1
1+0 records in
1+0 records out
10485760 bytes (10 MB) copied, 0.0480564 s, 218 MB/s
opensuse64:~/test_raid # dd if=/dev/zero of=disk2 bs=10M count=1
1+0 records in
1+0 records out
10485760 bytes (10 MB) copied, 0.0295233 s, 355 MB/s
opensuse64:~/test_raid # losetup -f disk1
opensuse64:~/test_raid # losetup -f disk2
opensuse64:~/test_raid # mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/loop0 /dev/loop1
mdadm: Note: this array has metadata at the start and
    may not be suitable as a boot device.  If you plan to
    store '/boot' on this device please ensure that
    your boot-loader understands md/v1.x metadata, or use
    --metadata=0.90
Continue creating array? yes
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md0 started.
opensuse64:~/test_raid # cat /proc/mdstat
Personalities : [raid1] 
md0 : active raid1 loop1[1] loop0[0]
      10176 blocks super 1.2 [2/2] [UU]
      
unused devices: <none>
opensuse64:~/test_raid # mdadm --manage /dev/md0 --fail /dev/loop1
mdadm: set /dev/loop1 faulty in /dev/md0
opensuse64:~/test_raid # cat /proc/mdstat
Personalities : [raid1] 
md0 : active raid1 loop1[1](F) loop0[0]
      10176 blocks super 1.2 [2/1] [U_]
      
unused devices: <none>
opensuse64:~/test_raid # mdadm --manage /dev/md0 --remove /dev/loop1
mdadm: hot removed /dev/loop1 from /dev/md0
opensuse64:~/test_raid # cat /proc/mdstat
Personalities : [raid1] 
md0 : active raid1 loop0[0]
      10176 blocks super 1.2 [2/1] [U_]
      
unused devices: <none>
opensuse64:~/test_raid # mdadm --zero-superblock /dev/loop1
opensuse64:~/test_raid # mdadm -E /dev/loop1
mdadm: No md superblock detected on /dev/loop1.
opensuse64:~/test_raid # mdadm --grow --force -n 1 /dev/md0
raid_disks for /dev/md0 set to 1
opensuse64:~/test_raid # cat /proc/mdstat
Personalities : [raid1] 
md0 : active raid1 loop0[0]
      10176 blocks super 1.2 [1/1] [U]
      
unused devices: <none>
opensuse64:~/test_raid # mdadm /dev/md0 -a /dev/loop1
mdadm: added /dev/loop1
opensuse64:~/test_raid # cat /proc/mdstat
Personalities : [raid1] 
md0 : active raid1 loop1[1](S) loop0[0]
      10176 blocks super 1.2 [1/1] [U]
      
unused devices: <none>
opensuse64:~/test_raid # mdadm --grow -n 2 /dev/md0
raid_disks for /dev/md0 set to 2
opensuse64:~/test_raid # cat /proc/mdstat
Personalities : [raid1] 
md0 : active raid1 loop1[1] loop0[0]
      10176 blocks super 1.2 [2/2] [UU]
      
unused devices: <none>