User's Guide

a. Resync the device group to make local volume PVOL.
# pairresync -g dg12 -c 15 -swaps
b. Wait for the dg12 device group to attain the PAIR state.
# pairevtwait -g dg12 -t 300 -s pair
4. Log on and perform the following from any DC1 node.
a. SWAP the roles of the dg12 device group between DC1 and DC2.
# horctakeover -g dg12 -t 360
5. Log on and perform the following from any DC2 node:
a. Wait for PSUS to come up for the Journal Device Group, dg23.
# pairevtwait -g dg23 -t 300 -s psus
b. Resync the Journal device group.
# pairresync -g dg23
c. Wait for the PAIR state to come up for the Journal device group.
# pairevtwait -g dg23 -t 300 -s pair
MULTI-TARGET-BI-LINK Data Recovery from DC3 to DC1
Use the following steps to restart a package back to DC1 after the package fails over to DC3:
1. Log on to any node on DC1.
a. Check the pair status of the dg12 device group.
# pairvolchk -g dg12 -s
b. If the local dg12 volume is in PVOL or SVOL-SSWS
# pairsplit -g dg12
Go to Step 2
If the local dg volume is other than SVOL-SSWS or PVOL perform an SVOL takeover to
make the local volume SVOL-SSWS or PVOL.
# horctakeover -g dg12 -S
# pairsplit -g dg12
Go to step 2,
If above command fails, split the pair to SMPL.
# pairsplit -g dg12 -S
2. Resync data from DC3 to DC1.
Resync the Journal device group to get the latest data from DC3 to DC1.
a. Check the pair status of dg13 at DC3.
# pairvolchk -g dg13 -s -c
b. If dg13 (DC3 side) is in PVOL
# pairresync -g dg13
Or
If dg13 (DC3 side) is in SVOL-SSWS.
# pairresync -g dg13 -c 15 -swapp
c. Wait for the PAIR state to come up for the Journal device group.
# pairevtwait -g dg13 -t 300 -s pair
Failback Scenarios 469