Hitachi Universal Storage Platform V Reference Manual page 77

Mode Category
749 Dynamic
Provisioning
Table 3-2
Mode 503
ON
OFF
Hitachi Universal Storage Platform V/VM User and Reference Guide
This option 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.
Note:
1. This option is applied when no change in performance
characteristic is desired.
2. This option is based on MODE 748. A pool created when
the MODE 748 is OFF can be subject to the Dynamic
Provisioning 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.
5. This option does not work for the pool installed while MODE
748 is ON. Only pools installed when MODE 748 is OFF can
be subject to the Dynamic Provisioning Rebalance function.
Modes 503 and 269: Storage Navigator Operations
Operation
Virtual LVI/LUN (CVS)
Virtual LVI/LUN (CVS)
Format
Format
Format
Virtual LVI/LUN (CVS)
Virtual LVI/LUN (CVS)
Format
Format
Format
Functional and Operational Characteristics
Function
Target of Operation
All LDEVs in a PG
Some LDEVs in a PG
PG is specified
All LDEVs in a PG
Some LDEVs in a PG
All LDEVs in a PG
Some LDEVs in a PG
PG is specified
All LDEVs in a PG
Some LDEVs in a PG
Default
OFF
Mode 269
ON OFF
No format No format
No format No format
No operation No operation
Low speed Low speed
Low speed Low speed
High speed Low speed
Low speed Low speed
No operation No operation
Low speed Low speed
Low speed Low speed
MCU/RCU
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