Subject:   -12- How do I extend an existing filesystem onto a new disk?
Date: 24 Jan 1994 00:00:01 EST

  Back up the existing filesystem (just in case) then run 'mklv' and
  'growfs'. 'mklv' and 'growfs' are nondestructive, so you don't need
  to restore the backup unless you screw up. Don't use 'mkfs', which
  does destroy existing data.