Allow Simultaneous Creation of LDEVs

LDEVs are automatically created in the internal volume when Yes is selected. If No is selected, you must create LDEV’s 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 LDEV’s manually.

Number of LDEVs per External Volume

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

Cache Partition

CLPR for accessing the external volume.

See Editing mapping policies for more information.

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 Hitachi Universal Volume Manager User Guidefor 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.

See Editing mapping policies for more information.

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, MPU-11, MPU-20 or MPU-21.

• Auto (default if it can be selected): Unit is automatically selected by the system.

• Unit with lowest number is the default when Auto cannot be selected.