Hitachi Universal Storage Platform VM - Manual (Page 74)

3-30 Functional and Operational Characteristics
Hitachi Universal Storage Platform V/VM User and Reference Guide
Mode Category Function Default MCU/RCU
729 Dynamic
Provisioning To set the Protect attribute for the target DP-VOL using Data
Retention Utility (DRU), when any write operation is requested
to the area where the page allocation is not provided at a time
when the HDP Pool is full.
Mode 729 = ON: To set the Protect attribute for the target
DP-VOL using DRU, when any write operation is requested to
the area where the page allocation is not provided at a time
when the HDP pool is full. (Not to set in the case of Read
request.)
Mode 729 = OFF (default): Not to set the Protect attribute for
the target DP-VOL using DRU, when any write operation is
requested to the area where the page allocation is not
provided at a time when HDP pool is full.
Note:
1. This SOM is applied when;
ƒ The threshold of pool is high (e.g., 95%) and the pool
may be full.
ƒ File system is used.
ƒ Data Retention Utility is installed.
2. Since the Protect attribute is set for V-VOL, the Read
operation cannot be allowed as well.
3. When Data Retention Utility is not installed, the desired
effect is not achieved.
4. Protect attribute can be released from the Data Retention
window of Storage Navigator after releasing the full status
of the pool by adding a Pool-VOL.
OFF –
733 Volume Migration
ShadowImage,
ShadowImage for
z/OS
This option enables to prevent Volume Migration or Quick
Restore operation during LDEV-related maintenance.
Mode 733 = ON: Volume Migration or Quick Restore operation
during LDEV-related maintenance is prevented.
Mode 733 = OFF (default): Volume Migration or Quick Restore
operation during LDEV-related maintenance is not prevented.
Note:
1. This option is applied when Volume Migration or Quick
Restore operation can be prevented during LDEV-related
maintenance.
2. The time to complete Volume Migration or Quick Restore
copy increases.
If virtual volume capacity expansion operation conflicts
with Volume Migration or Quick Restore operation, the
virtual volume capacity expansion operation may fail.
3. This option, which is for functional improvement to avoid
maintenance failure, is recommended to set as operations
from Storage Navigator may be disabled when a problem
occurs.
4. If this option is not applied, maintenance ends in failure if
Volume Migration or Quick Restore is executed while the
LDEV-related maintenance is being implemented.
OFF –