Edit Policies window

Allow Simultaneous Creation of LDEVs

If Yes is specified, LDEVs are automatically created in the external volume. If No is selected, you must create LDEVs manually.

Use External Storage System Configuration

If Yes is specified in "Allow Simultaneous Creation of LDEVs", the external volume's configuration for the LDEVs is used when Yes is selected. If No is selected, you must configure LDEVs manually.

Number of LDEVs per External Volume

Number of LDEVs to be created in the local system when the volume is mapped. Depends on the capacity of the external volume .

Cache Partition

CLPR for accessing the external volume.

Cache Mode

• Enable: Write data from the host is propagated asynchronously
• Disable: Write data from the host is propagated synchronously

See the planning topic in the Universal Volume Manager User Guide for more information.

Inflow Control

• Enable: Limits or prevents write data from being written to cache memory when the write operation cannot be performed.
• Disable: Allows write data to be written to cache when the write operation cannot be performed.

Load Balance Mode

Select I/O load balance system for external storage system.

• Normal Round-robin: Performs load balance in round-robin system.
• Extended Round-robin: Load balance system is automatically switched for sequential I/O and random I/O.
• Disable: Performs I/O operation with a single path, without load balance.

The default is Normal Round-robin.

MP Unit ID

MP unit ID for the external volume.

• You can select MPU-10 or MPU-20. For VSP G200, G400, G600, G800, VSP F400, F600, F800, MPU-11 or MPU-21 can also be selected.
• Auto (default): The unit is automatically selected by the system.
• If Auto cannot be selected, the unit with the lowest number is the default.

Internal Volume Usage

• Enable: Uses the internal volume as external volume.
• Disable: Does not use the internal volume as external volume.

The default is Disable.