Business Copy XP and/or Continuous Access XP for HPe3000
(After the split you may VSOPEN the PRODUCTION_DATA volume set on
System A and continue operations)
On System B After the primary volumes have been split from the Business Copy you can issue
the VSOPEN PRODUCTION_DATA command on System B and start
operations.
When operations are completed, VSCLOSE PRODUCTION_DATA;NOW and
from the Remote Control PC re-establish the primary and Business Copy mode.
There is no need to log off users from System A to re-establish Business Copy.
Continuous Access
The diagram above 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.
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 offloading.
The process is almost the same as that of Business Copy. First quies 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.
The following text is a script that was contributed that will help in splitting and
resyncing volume group pairs. With a little tweeking this script should work very well
on your HP e3000.
ESCON is used to link to the
remote XP256. The max
distance is 3Km without
repeaters and 43Km with
repeaters.
Business
Copy
System A System B
UV
OS
UV
OS
UV