External Storage window

Number of External Storage Systems

Number of external storage systems in which mapped external volumes reside

Number of External Paths

Number of external paths

Number of iSCSI Paths

Number of iSCSI paths of the local storage system set for connection to external storage systems

Number of External Volumes

Number of mapped external volumes

External Volume Capacity

Total capacity of mapped external volumes

Vendor / Model / Serial Number

Identifying information for the selected external storage system.

When the link is clicked, more information for the system is shown.

Status

Status of the external volume:

• Normal: There are no problems, the volume is usable.
• Disconnect: The external system or one of its mapped volumes has been intentionally disconnected.
• Checking: The system is checking the mapping path status
• Unknown: The status of the mapping path is not known.
• Cache Destage: Writing of data from cache memory to the volume is in progress.
• Warning: There are mapping paths whose status is not normal. You can check their status in the View External LUN Properties window.
• Blockade: The mapping path is blocked.
• Destage Failed: The writing of data from cache memory to the volume failed.

Number of External Path Groups

Number of external path groups in the external system

Port ID

Port of the local storage system

Type

Port type:

• Fibre: Fibre Channel port
• iSCSI: iSCSI port

Virtual Port ID

Virtual port of the local storage system

External

Information about the target port of the external storage system:

• IP Address: Target port IP address when the port type is an iSCSI port.
• TCP Port Number¹: Target TCP port number when the port type is an iSCSI port. Not displayed by default. To display the item, change the settings in the Column Settings window.
• WWN / iSCSI Target Name: WWN to show the target port when the port type is a Fibre Channel port. If the port type is iSCSI port, the iSCSI target name is displayed.

Vendor / Model / Serial Number

Identifying information for the external system

Status of external paths:

• Normal: There are no problems, the system is usable.
• Disconnect: The path has been intentionally disconnected.
• Checking: The system is checking the external path status.
• Unknown: The status of the external path is not known.
• Warning: There are external paths whose status is not normal. You can check their status in the View External LUN Properties window.
• Blockade: The external path is blocked.

QDepth

Number of read/write commands that can be queued to the external volume. 8 is the default.

When Load Balance Mode is Extended Round-robin and the I/Os issued to the external volume are sequential, the number of read/write commands that can be queued at one time is the total of the QDepth values of all the external paths.

I/O Timeout(sec.)

Number of seconds that should pass before I/O to the external volume times out. 15 seconds is the default.

Local

Local storage system port information:

• Port ID: Port ID
• Virtual Port ID: Virtual port ID
• CHAP User Name: CHAP user name, if specified

Remote

Remote storage system port information:

• IP Address: IP address
• TCP Port Number: TCP port number
• iSCSI Target Name: iSCSI target name
• Authentication Method: Method for authentication
• Mutual CHAP: Mutual CHAP setting
• CHAP User Name: CHAP user name, if specified

Used

Whether volume is mapped as an external volume:

• Yes: Used as an external path.
• No: Not used as an external path.