HP StorageWorks XP Remote Web Console Software - Manual (Page 62)

Table 36 Whether Reverse Restore and Fast Reverse Restore Can be Performed When a Version 2
Volume is Used as a Concurrent Copy/Compatible XRC Volume
Concurrent Copy/Compatible XRC Version 2
S-VOL P-VOL
No
1
No S-VOL
N/A N/A T-VOL
1
Do not execute Reverse Restore and Fast Reverse Restore when an S-VOL is shared by Version 2 and Concurrent Copy
or Compatible XRC. If you execute Reverse Restore and Fast Reverse Restore when an S-VOL is shared by Version 2 and
Concurrent Copy or Compatible XRC, the data in the S-VOL will be overwritten by the two programs and will be destroyed.
Optimization of Volumes
Volumes can be optimized by Version 2 if you use the DEFRAG command of the DFSMSdss utility
with the FASTREPLICATION option. See the IBM manual for details about the option.
CAUTION: The DEFRAG command may generate an error because the number of relationships
per volume exceeds the maximum when all the following conditions are met:
•
The parity group that includes the volume is overloaded with many accesses.
•
The DEFRAG command is executed with FASTREPLICATION(REQUIRED).
To avoid an error, avoid using the FASTREPLICATION option or specify
FASTREPLICATION(PREFERRED). If you specify FASTREPLICATION(REQUIRED), reduce the workloads
on the parity group.
62 About Version 2 Operations