HP XP Continuous Access Software - Manual (Page 330)

330 HP StorageWorks Disk Array XP RAID Manager: User’s Guide
Failback after SVOL-SMPL takeover
This failover situation occurs, for instance, when:
• The original P-VOL status is unavailable
• The S-VOL is changed to SMPL and unable to failback.
The Host B (DC1) sequence illustrated by the following figures is required
to change the SMPL volume to pvol_pair and make it suitable for failback.
From the Data Center 1 (DC1) side, the required steps are:
1. pairsplit –S
2. paircreate –vl
3. pairevtwait (wait for PAIR)
From the Data Center 2 (DC2) side, the required steps (not shown) would
be:
1. pairsplit –S
2. paircreate –vr
3. pairevtwait (wait for PAIR)
Refer to the state definitions in the table under the heading “HA control
script state transitions”
on page 326 .
Initial state:
Host A
PVOL
PSUS
DC2
Host B
SMPL
DC1
State No.4