Building Disaster Recovery Serviceguard Solutions Using Metrocluster with Continuous Access for P9000 and XP A.11.00

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
d. Swap the Journal device group role between DC1 and DC3.
# horctakeover -g dg13 -t 360
e. Wait for PAIR state to come up.
# pairevtwait -g dg13 -t 300 -s pair
3. Resync the device group to get latest data from DC1 to DC2.
• If in step 1 the dg12 has been brought to the SMPL state
a. Create the DC1 and DC2 sync device group when using 3DC Sync/CAJ replication.
# paircreate -g dg12 -f <never/data> -c 15 –vl
Or
Create the DC1 and DC2 Journal device group when using 3DC CAJ/CAJ replication.
# paircreate -g dg12 -f async -c 15 –vl –jp <journal id> -js
<journalid>
b. Wait for PAIR state to come for the dg12 device group.
# pairevtwait -g dg12 -t 300 -s pair
• If in Step 1 the dg12 pair was not split to SMPL and the dg12 local volume is PVOL.
If dg12 (DC2 side) is in SVOL-SSWS.
# pairsplit -g dg12 –RB
a.
148 Designing a Three Data Center Disaster Recovery Solution