Task Name

Identifies the operation within the system when Apply is clicked. Allows you to track the status of the operation.

External Path Group ID

Name of the external path group.

Vendor / Model / Serial Number

Identifying information for the external system.

Priority

Priority of external paths.

Port ID

Port connected to the external storage system for the local storage system.

External WWN

External system port identification number.

LUN ID(Highest Priority)

The LUN which is connected to the external path with the highest priority.

Device Name

Name of the storage system reported to the host by the external volume. The displayed name differs by vendor. For some Hitachi enterprise storage, this field displays emulation type.

Characteristic1

Identification number of the external volume.

The value is used by UVM to identify the LUN across multiple paths. The value is provided by the external system and may reflect internal numbering.

Characteristic2

Identification number of the external volume.

Drive Info

Information about the external volume’s drive type.

SATA displays when the external volume is a SATA drive of following storage systems.

• Virtual Storage Platform

• Universal Storage Platform V/VM

• HUS/AMS/WMS

• SMS

• Thunder 9500V

SSD displays when the external volume is the SSD of following storage systems.

• VSP G200, G400, G600

• Virtual Storage Platform G1000

• HUS VM Storage Platform

• Virtual Storage Platform

• Universal Storage Platform V/VM

Parity Group ID

Parity group numbers.

Top LDEV ID

External volume’s top LDEV ID.

Top LDEV Name

External volume’s top LDEV name.

Number of LDEVs

External volume’s number of LDEVs.

Capacity

External volume capacity.

CLPR

CLPR used for accessing to the mapped 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 Hitachi 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.

See Editing mapping policies for more information.

Path Mode

Displays operation mode of the external path.

• Single: Ordinarily, only one external port is used even if alternate paths are set. In Single mode, alternate paths are used only in case of maintenance work failure.

• Multi: When alternate paths are set, external paths from several ports are simultaneously used with load balancing.

• ALUA: When alternate paths are set, external paths from several ports are simultaneously used with load balancing. External paths connected to ports in Passive status are not used.

ALUA Permitted

Displays whether ALUA can be set as the Path Mode in the local storage system.

• Enable: ALUA Mode is used.

• Disable: ALUA Mode is not used.

Load Balance Mode

Displays 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.

MP Unit ID

External volume’s MP unit IDs.

LDEV Detail

Displays the External LDEV Properties window and you can check the selected external volume's details.