HP XP20000, XP24000 manual 138

Table 38 Path status and examples of recovery procedure (P9500 Disk Array)

Path Status	Examples of Recovery Procedure
External device setting changed	Settings of the LU paths may have been changed by LUN
	Manager. Check the 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
	Universal Volume Manager 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 Response error	The volume may have been set as a pair volume for data
	copy. Check if the volume is set as a pair volume of
	ShadowImage, TrueCopy, Universal Replicator or some
	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 connection to the external storage
	system. The possible causes are:
	• The fibre 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 fibre 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.

Notes on Using the Power Savings Option (AMS/WMS)

When the AMS 2500, AMS 2300 or AMS 2100 storage system is connected as an external storage system and the Power Savings option is enabled on the external storage system, do not access external volumes from a host if the external volumes are spinning down. If an external volume is accessed from a host when the external volume is spinning down, the status of the external volume changes to Blockade.

If the status of the external volume changes to Blockade, the external volume will be automatically restored in several hours. You can also manually restore the external volumes by using the Check Paths & Restore Volume command.

Thunder 9500V Storage System

System Parameters

Table 39 (page 139) explains whether to specify system parameters when making settings on ports on the Thunder 9500V storage system.

138 Connecting External Storage Systems