Tag Archives: mirrored

How to Create a Mirrored Root Pool After Installation ?

  1. Display your current root pool status.
    # zpool status rpool
      pool: rpool
     state: ONLINE
     scrub: none requested
    config:
    
            NAME        STATE     READ WRITE CKSUM
            rpool       ONLINE       0     0     0
              c1t0d0s0  ONLINE       0     0     0
    
    errors: No known data errors
  2. Attach a second disk to configure a mirrored root pool.
    # zpool attach rpool c1t0d0s0 c1t1d0s0
    Please be sure to invoke installboot(1M) to make 'c1t1d0s0' bootable.
    Make sure to wait until resilver is done before rebooting.
  3. View the root pool status to confirm that resilvering is complete.
    # zpool status rpool
      pool: rpool
     state: ONLINE
    status: One or more devices is currently being resilvered.  The pool will
            continue to function, possibly in a degraded state.
    action: Wait for the resilver to complete.
     scrub: resilver in progress for 0h1m, 24.26% done, 0h3m to go
    config:
    
            NAME          STATE     READ WRITE CKSUM
            rpool         ONLINE       0     0     0
              mirror-0    ONLINE       0     0     0
                c1t0d0s0  ONLINE       0     0     0
                c1t1d0s0  ONLINE       0     0     0  3.18G resilvered
    
    errors: No known data errors

    In the above output, the resilvering process is not complete. Resilvering is complete when you see messages similar to the following:

    scrub: resilver completed after 0h10m with 0 errors on Thu Mar 11 11:27:22 2010
  4. Apply boot blocks to the second disk after resilvering is complete.
    sparc# installboot -F zfs /usr/platform/`uname -i`/lib/fs/zfs/bootblk /dev/rdsk/c1t1d0s0
    x86# installgrub /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/c1t1d0s0
  5. Verify that you can boot successfully from the second disk.
  6. Set up the system to boot automatically from the new disk, either by using the eeprom command, the setenv command from the SPARC boot PROM. Or, reconfigure the PC BIOS.