HP XP Continuous Access Software - Manual (Page 348)

348 HP StorageWorks Disk Array XP RAID Manager: User’s Guide
Unknown The attribute of the remote node is unknown. This
means that the remote node system has failed or cannot
communicate.
Swap-takeover function
It is possible to swap the designations of the primary and secondary
volumes when the P-VOL of the remote disk array is in the PAIR or PFUL
(async-CA and over HWM) state and the mirror consistency of S-VOL data
has been assured.
The takeover command carries out the commands internally to swap the
designations of the primary and secondary volumes. You can specify
swapping at the granularity of volume pair, CT group, or volume group.
Swap-takeover works differently according to microcode version:
XP256 microcode 52-47-xx and under
XP512/48 microcode 10-00-xx and under
1. The command splits the pair and puts each volume in the SMPL state.
If this step fails, the swap-takeover function is disabled and the
SVOL-takeover
command executes.
2. The local volumes of the takeover node are paired in “No Copy” mode
and switched to be the primary volume.
If this step fails, step 1 repeats to cancel the operation of step 2, and
the SVOL-takeover function is then executed.
If step 1 fails again, the swap-takeover fails.