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A-4 Connecting External Storage Systems
Hitachi Universal Storage Platform V/VM Universal Volume Manager User’s Guide
Path Status and Examples of Recovery Procedure
(AMS/WMS)
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-4 Path Status and Examples of Recovery Procedure (AMS/WMS)
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 LU operation and perform the Add LU 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 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.
If host group security is enabled, disable host group security using LUN Manager.