Advanced system settings

Global Active Device for VSP One Block

Version

10.5.x

Audience

anonymous

Part Number

MK-23VSP1B011-10

ft:lastEdition

2026-05-04

The advanced system settings allow the storage systems to be configured to specific customer operating requirements. You can change the advanced system settings by using the raidcom modify user_system_opt CCI command.

You can use advanced system settings No. 5 and No. 6 to change the differential data management method for a new or existing TC, TCz, UR, URz, or GAD pair. The following table shows how the advanced system setting No. 5 works with No. 6.

Advanced system settings		Description
No. 5	No. 6	Create operation	Resync operation
Disabled	Disabled	(For VSP One B85) Apply hierarchical difference management at new pair creation. (For VSP One B20 series) Apply shared memory (SM) difference management at new pair creation.	(For VSP One B85) The differential data management method of the existing pair is not changed. The SM difference or hierarchical difference management for a pair remains unchanged after the pair resynchronization. (For VSP One B20 series) Change the differential data management method of the existing pair from the hierarchical difference management to the SM difference management when the pair is resynchronized and the pair status changes to PAIR after No. 5 and No. 6 settings.
Disabled	Enabled	Hierarchical difference management is applied at the new pair creation.	The differential data management method of the existing pair is not changed. The SM difference or hierarchical difference management for a pair remains unchanged after the pair resynchronization.
(For VSP One B85) Enabled	(For VSP One B85) Enabled	(For VSP One B85) SM difference management is applied at new pair creation.	(For VSP One B85) Change the differential data management method of the existing pair from the hierarchical difference management to the SM difference management when the pair is resynchronized and the pair status changes to PAIR after No. 5 and No. 6 settings.
Enabled	Disabled	Hierarchical difference management is applied at the new pair creation.	Change the differential data management method of the existing pair from the SM difference management to the hierarchical difference management when the pair is resynchronized and the pair status changes to PAIR after No. 5 and No. 6 settings.
Notes: If the user capacity of a volume used in a TC, UR, or GAD pair exceeds 4,194,304 MB for an open-systems volume (only DP-VOL), the differential data management for the target volume is enabled by the hierarchical difference at the new pair creation regardless of the settings for the advanced system settings No. 5 and No. 6. Make the same settings of the advanced system settings No. 5 and No. 6 for both the primary and secondary storage systems. If system option mode (SOM) 1198 or 1199 is applied, the difference management method with SOM 1198 or 1199 takes precedence. For more information about SOMs 1198 and 1199, see the System Administrator Guide.