Communicator e3000 MPE/iX Release 6.5 (Non-Platform Software Release C.65.00 (30216-90291)

124 Chapter4
Data Center Management
SureStore E Disk Array XP256 Business Copy XP and/or Continuous Access XP in an HP 3000 Environment
Continuous Access
The diagram below describes the use of both Continuous Access and Business Copy to
provide both disaster recovery and off loading of work done by the remote data center.
Figure 4-2. Using Both Business Copy and Continuous Access
The goal is to always maintain a link to the primary volume set through Continuous
Access and use a separate set of disks that are maintained by Business Copy for planned
events like work off-loading.
The process is almost the same as that of Business Copy. First quiesce I/O and log users off
the PRODUCTION_DATA volume set by issuing the VSCLOSE;NOW command on System A.
Then when all data has been moved to the remote XP256 only then do you split the
Business Copy volumes from the Continuous Access volumes on the remote XP256.
Only when the Business Copy volumes are split on the remote XP256 can System B
VSOPEN its copy of the PRODUCTION_DATA volume set.