A-8 Connecting External Storage Systems

Hitachi Universal Storage Platform V/VM Universal Volume Manager User’s Guide

Path Status and Examples of Recovery Procedure (9500V)
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 the following table to recover the path status. If you cannot
restore the path, call the Hitachi Data Systems Support Center (see Calling the
Hitachi Data Systems Support Center).

Table A-8 Path Status and Examples of Recovery Procedure (9500V)

Path Status Examples of Recovery Procedure
External device setting
changed
Settings of the LU paths may have been changed by LUN Management.
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 LU
operation and perform the Add LU operation again.
The access attribute of the volume may have been changed by Open LDEV
Guard. 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 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 Open LDEV
Guard. 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 Management.
The host group security may have been enabled by LUN Management.
Check if the host group security is enabled or not. If the host group security
is enabled, disable the host group security.