HP XP Business Copy Software - Manual (Page 51)

that pair will be restricted. In addition, the maintenance for LDEVs, which set the Reserve
attribute by XP Business Copy will be restricted too. To maintain these LDEVs, suspend or
delete the XP Business Copy pair, or reset (unreserve) the Reserve attribute.
Cautions on Maintaining the Cache
If storage system cache maintenance is performed during a period of high I/O usage, one or more
XP Business Copy pairs may suspend. Reduce the I/O load before cache maintenance.
Cautions on Switching Off the Power Supply
If you have to switch off the power supply of the storage system during XP Business Copy operations,
make sure to:
•
Complete the copying operation for the XP Business Copy pair in the COPY(SP) or PSUS(SP)
status to change the pair status from COPY(SP) or PSUS(SP) to PSUS, and then switch off the
power supply.
If the shared memory is volatilized when you switch on the power supply again, the pair in
the COPY(SP) or PSUS(SP) status changes to PSUE.
•
Complete the processing of At-Time Split function, and then switch off the power supply.
If the status of only a part of the pairs in the same consistency group is changed, the processing
of At-Time Split function may not resume when you switch on the power supply, and the status
of some pairs may remain unchanged.
•
Establish a timetable for any XP Business Copy copying operations that may take longer
because of the power-supply off (PSOFF).
If the shared memory is volatilized when you switch on the power supply again, the following
conditions occur.
◦ If the XP Business Copy pair was in the COPY(PD) or COPY(SP) status, data that was
already copied before the power-supply off (PSOFF) again becomes the target data to
be copied after the power-supply on (PSON). Even if there is no host I/O, the data
consistency rate does not reach 100% when the XP Business Copy pair status changes
to PAIR. When the XP Business Copy pair status changes to PAIR, the target data is copied
to the secondary volume.
◦ If the XP Business Copy pair was in the PAIR status, data that was already copied before
the power-supply off (PSOFF) again becomes the target data to be copied after the
power-supply on (PSON). In this case, the data consistency rate is 0%, and the target
data is copied to the S-VOL.
◦ If the XP Business Copy pair was in the PSUS status, the entire volume becomes the
differential data. In this case, the data consistency rate is 0%, and the entire volume is
copied to the secondary volume when you perform the pairresync operation.
Installing XP Business Copy
To operate XP Business Copy on the Remote Web Console computer, you need to install XP Business
Copy by using the license key.
To install XP Business Copy:
Installing XP Business Copy 51