HP XP Continuous Access Software - Manual (Page 81)

5. When you perform delta resync operation on the volume in XP Continuous Access Synchronous
primary site, the status of the XP Continuous Access Journal pair's data volumes changes as
explained in
Table 21 (page 81) .
Table 21 Changes to XP Continuous Access Journal pair status by delta resync ops. (transferring
tasks between XP Continuous Access Journal secondary to primary sites)
Pair status after delta resync operation Pair status before delta resync operation XP Continuous Access
Journal pair
Secondary data
volume Primary data volume Secondary data
volume Primary data volume
PAIR or COPY PAIR or COPY HOLD HOLD XP Continuous Access
Journal pair between
XP Continuous Access
Synchronous primary
site and XP
Continuous Access
Journal secondary site
HOLD HOLD PAIR, PSUS, or PSUE PAIR, PSUS, or PSUE XP Continuous Access
Journal pair between
XP Continuous Access
Synchronous
secondary site and XP
Continuous Access
Journal secondary site
CAUTION: After you remove failures from the primary site and other locations and then the system
is changed to 3DC multi-target configuration (see Requirements for creating XP Continuous Access
Journal pairs for delta resync operations ), the status of a pair between the primary site and the XP
Continuous Access Journal secondary site may be abnormal. If the status of the pair remains
abnormal, you will be unable to transfer your business tasks back to the primary site. To solve this
problem, check the pair status and then perform a problem-solving operation before transferring
business tasks back to the primary site.
Table 22 Pair Status and Operation after Recovery of the Primary Site
Perform the Following Operation before Transferring Business
Tasks Back to the Primary Site If the Status of the Pair
in the UR Secondary
Site is If the Status of the
Pair in the Primary
Site is No
Make sure that the status of the pair in the primary site is PSUE
or PSUS, and then perform the operation explained in row No.
3 of this table. HOLD COPY 1
Perform the operation explained in row No. 1 of this table. HOLD PAIR 2
1. Remove the XP Continuous Access Journal pair from the
primary site.
2. Make sure that all the pairs belonging to the journal group
in the primary site are removed.
3. Create an XP Continuous Access Journal delta resync pair
that extends from the primary site to the XP Continuous Access
Journal secondary site. For information about requirements
for creating the pair, see
Requirements for creating XP
Continuous Access Journal pairs for delta resync operations .
HOLD PSUE or PSUS 3
The pair is in normal condition. You can transfer business tasks
as described earlier in this section. HOLD HOLD 4
Combining XP Continuous Access Journal with other data management functions 81