Some drivers do not yet support DR operations. A DR-compatible driver must be suspendable. Use this command to test for suspendable drivers.
# cfgadm -x quiesce-test sysctrl#:slot#
DR may not yet support some types of I/O and CPU/memory boards in Enterprise 3x00, 4x00, 5x00, and 6x00 systems. Use the quiesce test (above) or refer to the latest release notes.