Hitachi Virtual Storage Platform, User And Reference Manual

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Hitachi VSP User and Reference Guide
2–36
Functional and Operational Characteristics
749 Microcode
version V02
and lower:
Dynamic
Provisioning,
Dynamic
Tiering
Microcode
version
V02_ICS or
V02+1:
Dynamic
Provisioning
Dynamic
Provisioning
for Mainframe
Dynamic
Tiering
Microcode
version V03
and higher:
Dynamic
Provisioning
Dynamic
Provisioning
for Mainframe
Dynamic
Tiering
Dynamic
Tiering for
Mainframe Disables the Dynamic Provisioning Rebalance
function that allows the HDDs of all ECC Groups in
the pool to share the load.
Mode 749 = ON:
The Dynamic Provisioning Rebalance function is
disabled.
Mode 749 = OFF (default):
The Dynamic Provisioning Rebalance function is
activated.
Notes:
1. This option is applied when no change in
performance characteristic is desired.
2. All HDP pools are subject to the HDP Rebalance
function.
3. When a pool is newly installed, the load may be
concentrated on the installed pool volumes.
4. When 0 data discarding is executed, load may
be unbalanced among pool volumes.
OFF .
757 Open and
Mainframe Enables/disables output of in-band audit logs.
Mode 757 = ON:
Output is disabled.
Mode 776 = OFF (default):
Output is enabled.
Notes:
1. Mode 757 applies to the sites where outputting
the In-band audit logs is not needed.
2. When this option is set to ON
- There is no access to SM for the In-band audit
logs, which can avoid the corresponding
performance degradation.
- SM is not used for the In-band audit logs.
3. If outputting the In-band audit log is desired,
set this mode to OFF.
OFF MCU/RCU
Mode Category Description Default MCU/RCU