Hitachi Universal Storage Platform VM User Manual
Page 64
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Functional and Operational Characteristics
Hitachi Universal Storage Platform V/VM User and Reference Guide
Mode
Category
Function
Default
MCU/RCU
548
TrueCopy for z/OS,
Universal
Replicator for z/OS,
or ShadowImage
for z/OS used from
Business Continuity
Manager
Prevents pair operations of TCz, URz, or SIz via Command
Device online.
Mode 548 = ON: Pair operations of TCz, URz, or SIz via online
Command Device are not available. SSB=0x64fb is output.
Mode 548 = OFF: Pair operations of TCz, URz, or SIz via
online Command Device are available. SIM is output.
Note:
When Command Device is used online, if a script
containing an operation via Command Device is executed,
the script may stop if this mode is set to ON. As described
in the Business Continuity Manager user’s guide, the script
must be performed with Command Device offline.
This mode applies to operations from Business Continuity
Manager that are operated on MVS.
OFF MCU/RCU
556 OPEN
Prevents an error code from being set in the 8 - 11th bytes in
the standard 16-byte sense byte.
Mode 556 = ON: An error code is not set in the 8 - 11th bytes
in the standard 16-byte sense byte.
Mode 556 = OFF (default): An error code is set in the 8 - 11th
bytes in the standard 16-byte sense byte.
OFF MCU/RCU
561
ShadowImage,
Universal Volume
Manager
Allows Quick Restore for external volumes with different
Cache Mode settings.
Mode 561 = ON: Quick Restore for external volumes with
different Cache Mode settings is prevented.
Mode 561 = OFF (default): Quick Restore for external
volumes with different Cache Mode settings is allowed.
OFF MCU/RCU