Hitachi VSP G200 System Administration Manual page 364

Mode Category
729 Dynamic
Provisioning
Data Retention
Utility
733 ShadowImage
Volume Migration
364
System Administrator Guide for VSP Gx00 models and VSP Fx00 models
Description
6. When a virtual volume mapped by UVM is set to pool-
VOL and used as DP-VOL in local storage system, this
SOM can be applied without problem.
When a DP pool is full, if any write operation is requested to
the area where the page allocation is not provided, this SOM
can enable the DRU Protect attribute for the target DP-VOL.
Mode 729 = ON: Set the DRU Protect attribute for the
target DP-VOL when any write operation is requested to the
area where the page allocation is not provided at a time
when the DP pool is full. (Not to set in the case of Read
request.)
Mode 729 = OFF (default): Do not set the DRU Protect
attribute for the target DP-VOL when any write operation is
requested to the area where the page allocation is not
provided at a time when DP pool is full.
For details, contact customer support (see SOM729 & 803
sheet).
Notes:
1. This SOM is applied when:
• The threshold of pool is high (for example, 95%)
and the pool may be full.
• File system is used.
• 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 Device Manager - Storage
Navigator after releasing the full status of the pool by
adding a Pool-VOL.
5. With 83-01-21-x0/00 and later, the Virtual Volume
Protection (VVP) function is supported. VVP can be
enabled/disabled for each pool. With SOM 729 disabled,
VVP is also disabled by default, but you can enable VVP
for each pool as needed. With SOM 729 enabled, VVP is
also enabled automatically (by default) when you create
a new pool. Caution: A pool is NOT protected by ANY
FUNCTION if you deliberately turn VVP for the pool from
ON (default) to OFF, even with SOM 729 enabled.
6. With or 83-01-21-x0/00 and later, when HMO 63 or 73
is set to ON, the setting of the HMO is prioritized over
the SOM 729 setting, so that the behavior remains the
same as when SOM 729 is OFF even when it is set to
ON.
This SOM enables to suspend Volume Migration or Quick
Restore operation during LDEV-related maintenance.
Mode 733 = ON: Volume Migration or Quick Restore
operation during LDEV-related maintenance is not suspended.
Mode 733 = OFF (default): Volume Migration or Quick
Restore operation during LDEV-related maintenance is
suspended.
System option modes
Default MCU/RCU
OFF -
OFF -