90 External Storage XP for the XP12000/XP10000
• If you select the external disk array’s WWN, connection information about the paths between the
selected WWN and local disk 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 disk array in the WWN tree, select the
WWN identifying the external disk array’s port in the WWN list. In this case, you can restore the
path of all ports of the local disk array connected to the WWN at one time.
• If you selected the external disk array’s WWN in the WWN tree, select the path between the
selected WWN and the port of the local disk array. In this case, you can restore the selected path
to the port of the local disk 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 disk array’s port setting
You can change the setting of an external disk array’s port by specifying the WWN that identifies the
external disk array’s port in the WWN list. Use the Change Parameter pane (Figure 47) to change the port
setting.
Figure 47 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 until the path is blocked after the connection to the external disk
array has been recognized as being down. 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 volume 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 disk array.
To change the setting of the port identified by the WWN by specifying an external disk array’s
WWN
1. In the LU Operation pane, select the WWN tab. The WWN tree and WWN list appear.
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