HP StorageWorks XP Remote Web Console Software - Manual (Page 29)

Figure 7 Delta Resync Setting 3DC Multi-Target Configuration - Before Failure Occurs
As shown in Figure 7 (page 29) , an XP Continuous Access Journal pair created with the delta
resync operation is defined as a pair (HOLD status) but an actual copy operation is not performed
until the failure occurs and the delta resync operation is performed. There are several requirements
to create an XP Continuous Access Journal pair for the delta resync operation, such as specifying
the unused mirror ID. For detailed information about the requirements of creating an XP Continuous
Access Journal pair for the delta resync operation, see
“Requirements for Creating an XP Continuous
Access Journal Pair for the Delta Resync Operation” (page 89) . For information about the delta
resync operation performed when a failure occurs in the configuration shown in “Delta Resync
Setting 3DC Multi-Target Configuration - Before Failure Occurs” (page 29) , see “Switching the
Master Journal Group of XP Continuous Access Journal” (page 30) .
When the failure occurs, before performing the delta resync operation, the XP Continuous Access
Journal pair needs to be in HOLD status. However, the XP Continuous Access Journal pair status
may be changed to HLDE. Examples include times when the cache memory or the shared memory
error occurs in the XP Continuous Access Synchronous secondary site, or when no journal can be
Journal Obtain at XP Continuous Access Synchronous Secondary Site 29