HP XP20000, XP24000 manual 142

Table 43 Path Status and Examples of the Recovery Procedure (USP V/VM)

Path Status	Examples of the Recovery Procedure
External device setting	Settings of the LU paths may have been changed by LUN Manager. Check the
changed	settings of the LU paths. If the settings of the LU paths have been changed,
	change the settings back to the ones when the volume is mapped. Or use XP
	External Storage to perform the Delete Volume operation and perform the Add
	Volume operation again.
	The access attribute of the volume may have been changed by Data Retention
	Utility. Check the access attribute of the volume. If the volume is protected by
	the access attribute, release the protection.
Illegal request or	The volume may have been set as a pair volume for data copy. Check if the
Response error	volume is set as a pair volume of XP Business Copy, XP Continuous Access, XP
	Continuous Access Journal, or other copy program. If the volume is set as a
	pair volume, the volume may be protected because of the pair status. When
	the volume is protected, change the pair status or delete the pair.
	The access attribute of the volume may have been changed by Data Retention
	Utility. Check the access attribute of the volume. If the volume is protected by
	the access attribute, release the protection.
Cannot detect port	There is a problem with the connection to the external storage system. The
	possible causes are:
	• The fiber cable is not physically connected in the proper way.
	• The setting of the topology does not match between the external port and
	the target port.
	• If the external storage system is connected through switches, the settings for
	the switches may not be appropriate.
	Make sure that the fiber cable is connected properly, and then set the Fibre
	Channel port properly using LUN Manager.
	The LUN security may have been enabled by LUN Manager. Check if the LUN
	security is enabled or not. If the LUN security is enabled, disable the LUN
	security.

TagmaStore USP/NSC Storage System

When connecting a TagmaStore USP or NSC storage system as the external storage system, you need to set the port to the host group for the Windows hosts (host mode 0C: Windows, host mode 2C: Windows Extension).

Also, the port attribute must be the target port or the RCU target port.

Setting the Host Mode Option for a Volume Larger Than 2 TB (USP/NSC)

If a volume that has the capacity of more than 2 TB is mapped as an external volume, host mode option No. 24 must be enabled. If No. 24 is disabled, a volume that has the capacity of more than 2 TB cannot be mapped as an external volume. For instructions on the host mode option, see the HP StorageWorks XP24000/XP20000 LUN Manager User Guide.

Path Status and Examples of the Recovery Procedure

This section describes errors that require recovery operation on the external storage system side when the path status is not normal. When the path status is not normal, see Table 44 (page 143) to recover the path status. For other errors not described in this section, see “Troubleshooting for XP External Storage” (page 126). If you cannot restore the path, call HP technical support.

142 Connecting External Storage Systems