machine_name="ziqi"   # for verification purpose
p_boot=$(
  print /dev/dsk/c0t9d0s0
  print /dev/dsk/c0t9d0s1
  print /dev/dsk/c0t9d0s3
  print /dev/dsk/c0t9d0s4
  print /dev/dsk/c0t9d0s6
)
b_boot=$(
  print /dev/md/dsk/d0
  print /dev/md/dsk/d1
  print /dev/md/dsk/d3
  print /dev/md/dsk/d4
  print /dev/md/dsk/d6
)
backup_dir="/apps4"   # optional directory to hold boot disk backup