HP XP Continuous Access Software - Manual (Page 352)

352 HP StorageWorks Disk Array XP RAID Manager: User’s Guide
PVOL-takeover function
The PVOL-takeover function terminates the PAIR state of a pair or group.
The takeover node is given unrestricted and exclusive access to the primary
volume (reading and writing are enabled), on the assumption that the
remote node (controlling the S
- VOL) is unavailable or unreachable.
The PVOL-takeover function has two roles:
• PVOL-PSUE-takeover puts the P-VOL into PSUE state, which
permits “WRITE” access to all primary volumes of that group.
• PVOL-SMPL-takeover puts the P-VOL into SMPL state.
PVOL-takeover first attempts to use PVOL-PSUE-takeover. If
PVOL-PSUE-takeover fails, then PVOL-SMPL-takeover is executed.
You can specify PVOL-takeover with a granularity of logical volume or
group.
P-VOLs (primary volumes) in DATA fence will not accept write
commands after ESCON/FC link or remote array failures. PVOL-takeover
can be used on these P-VOLs to allow the application to update the P-VOL
if you choose to do so. However, none of those updates will be replicated or
mirrored to the remote S-VOL.
Async-CA specific behavior
PVOL-takeover is not executed. It becomes a nop-takeover.