Hitachi Virtual Storage Platform G400, Reference Manual

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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 the
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:
Not to set the Protect attribute for the target DP-VOL using
the 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.
Notes:
1. This System Option Mode is applied when;
-The threshold of Pool is high (e.g., 95%) and the Pool may
be full.
-DP V-VOL uses file system.
-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 the 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.
5. With VSP Gx00/Fx00 V01+1 and later, do not change the
mode setting but use the virtual volume protection function
when the pool is full to change the setting.
6. With VSP Gx00/Fx00 V01+1 and later, when HM O63 or
73 is set to ON, the setting of the HMO is prioritized over
the System Option Mode 729 setting so that the behavior
remains as that of setting the mode to OFF even when the
System Option Mode is set to ON.
733
This option enables to suspend Volume Migration or Quick
Restore operation during LDEV-related maintenance.
USP V/VM:
Mode 733 = ON:
Volume Migration or Quick Restore operation during LDEV-
related maintenance is suspended.
Mode 733 = OFF:
Volume Migration or Quick Restore operation during LDEV-
related maintenance is not suspended.
VSP and later models, HUS VM and later models:
OFF
System option modes 63
Hitachi Virtual Storage Platform G400, G600 Hardware Reference Guide