HP StorageWorks XP Remote Web Console Software User Manual
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Table 8 Universal Replicator for Mainframe Suspension Condition
Universal Replicator for
Mainframe Pairs to be
Suspended
Detected by:
Suspension Condition
All Universal Replicator for
Mainframe secondary data
RCU
The secondary storage system could not copy the
journal data successfully due to a hardware failure or
logic error.
volumes in the journal groups,
or the affected secondary data
volume.
All the Universal Replicator for
Mainframe secondary data
RCU
The secondary storage system detected a logical error
while selecting the journal data to be restored.
volumes in the journal group, or
RCU
The secondary storage system could not restore the
journal data due to a hardware failure, track condition,
or logical error.
only the affected secondary data
volume, depending on the type
of failure.
The primary storage system stores the differential bitmap per Universal Replicator for Mainframe
primary data volume in the shared memory. The secondary storage system stores the differential
bitmap per Universal Replicator for Mainframe secondary data volume in the shared memory.
When a Universal Replicator for Mainframe pair is suspended, the tracks which contain the following
journal are marked in the differential bitmap as modified (to be copied during the resume pair
operation):
•
The journal data that were created by the primary storage system but not yet sent to the
secondary storage system.
After marking these primary data volume tracks as modified, the primary storage system
discards these journal data.
•
The journal data that were sent to the secondary storage system but not acknowledged by the
secondary storage system.
After marking these primary data volume tracks as modified, the primary storage system
discards these journal data. This ensures that journal data lost during transmission to the
secondary storage system are identified and marked.
•
The journal data that reached the secondary storage system but have not yet been settled.
After marking these secondary data volume tracks as modified, the secondary storage system
discards these journal data.
•
The primary data volume records updated by host-requested write I/Os after the pair was
suspended.
When a suspended Universal Replicator for Mainframe pair is resumed (resynchronized), the
contents of the secondary storage system’s cylinder/track bitmap are sent to the primary storage
system and merged into the primary storage system’s bitmap. The primary storage system then
performs the resync operation according to the merged bitmap. This ensures that all the tracks
including the discarded journal data are resynchronized at this time.
XP for Business Continuity Manager Software Support
The storage systems on which Universal Replicator for Mainframe is installed support the XP for
Business Continuity Manager Software commands. If the host system issues the Business Continuity
Manager commands to the storage system, the Universal Replicator for Mainframe pair operations
can be performed. The Business Continuity Manager commands allow you to add pairs, suspend
pairs, resume pairs, release pairs, monitor the pair status, add a DKC, and delete a DKC.
and
explain the XP disk array system adapter ID (SAID)
values. For further information and instructions on Business Continuity Manager, see the HP XP for
Business Continuity Manager Software User's Guide.
XP for Business Continuity Manager Software Support
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