Hitachi Universal Storage Platform V Reference Manual page 73

Mode Category
726 Dynamic
Provisioning
727 ShadowImage,
ShadowImage for
z/OS
FlashCopy v1, v2
Volume Migration
COW Snapshot
Dynamic
Provisioning
Hitachi Universal Storage Platform V/VM User and Reference Guide
Prevents a virtual group from having more than one Dynamic
Provisioning (DP) volume created at a time.
Mode 726 = ON: In the window for DP volume creation, a
virtual group is prevented from having more than one DP
volume created. Also, the Virtual LVI/LUN operation of the DP
volume is prevented.
Mode 726 = OFF (default): A virtual group can have multiple
DP volumes created (the same operation as before).
Note: When this system option mode is set to ON, only up to
63,232 DP volumes can be created per storage system.
This option enables to save and recover the local copy control
information when the power supply is ON and OFF.
Mode 727 = ON: Control information is sent from SM and
saved in a system disk when the power supply is OFF.
If SM is volatilized and recovery of local copy control
information from the HDD of SVP fails at the time when the
power supply is on following power off, recovery of the control
information from a system disk to the SM is implemented.
Mode 727 = OFF (default): Save and recovery of control
information using a system disk is not implemented.
Note:
1. This option is also turned ON or OFF by switching the
Additional Configuration Back Up to ON or OFF using the
System Disk Option of VLL function of Storage Navigator.
2. This option is applied when the necessity to complement
the save and recovery using a system disk in addition to
the save and recovery with a HDD of SVP is required at
customers' sites where the Program Products listed in the
Category column are used.
3. When this option is applied, as turning the power ON/OFF
takes longer (up to 15 minutes), review on timeout setting
of connection system is required.
4. Make sure to turn this option on after preparing a normal
system disk that has the available capacity of more than
7,744 MB (9,082 cylinders for 3390 track format). If Define
Configuration & Install is performed, turn this option on
after formatting the system disk.
Functional and Operational Characteristics
Function Default MCU/RCU
OFF –
OFF –
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