HP StorageWorks External Storage XP user guide (T1706-96006, June 2006)

External Storage XP user guide 103
• If you select the external array’s WWN, connection information about the paths between the
selected WWN and local array ports appear in the WWN list.
3. In the WWN list, select the WWN for which you want to restore the path.
• If you selected the product name of the connected external array in the WWN tree, select the
WWN identifying the external array’s port in the WWN list. In this case, you can restore the path of
all ports of the local array connected to the WWN at one time.
• If you selected the external array’s WWN in the WWN tree, select the path between the selected
WWN and the port of the local array. In this case, you can restore the selected path to the port of
the local array individually.
4. Right click, and select Check Paths. Selected items appear in blue italics in the WWN tree and WWN
list. The contents of the setting appears in the Preset list.
To check the setting details, right-click the setting in the Preset list, and select Detail. To cancel the
setting, right-click the setting in the Preset list, and select Delete.
5. Click Apply. A confirmation message appears.
6. Click OK.
Changing an external array’s port setting
You can change the setting of an external array’s port by specifying the WWN that identifies the external
array’s port in the WWN list. Use the Change Parameter pane (Figure 59) to change the port setting.
Figure 59 Change Parameter pane
• IO TOV (10-240): Timeout value for the I/O to the external LU. The value can be 10 to 240 (in second).
• QDepth (8-128): Number of Read/Write commands that can be issued (queued) to the external LU at
one time. The value can be from 8 to 128.
• Path Blockade Watch (10-180): Time period beginning when the connection of all paths to the external
LU is down and ending when the external LU is blocked. Commands from the host are accepted until
the time set for this parameter has passed. After the time has passed, the path status becomes
Blockade. The value can be from 10 to 180 (seconds).
CAUTION: If there is no problem with the default setting, use the default setting.
CAUTION: For the external LU used for typical I/O, set IO TOV to 15 seconds.
CAUTION: To change the setting, match the value to the recommended value for the external array.
To change the setting of the port identified by the WWN by specifying an external array’s WWN:
1. In the LU Operation pane, select the WWN tab. The WWN tree and WWN list appear.
2. In the WWN tree, select the product name of the connected external array identifying the external
array’s port. The WWNs of all the ports that are connected to the local array and are used appear in
the WWN list.
3. In the WWN list, select the port for which you want to restore the path.