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Error
Unavailabl
e
Backoff
The volume in
Remove the error and retry the operation. The reason for the error could be as
the external
follows:
storage system
Storage Navigator is not in the Modify mode.
cannot be found
Port of the local storage system and the port of the external storage system are
even after the
not connected.
Port Discovery or
the Volume
Port security is set on the external storage system.
Discovery was
The device in the external storage system is not in the Normal status.
performed.
External storage system is not connected to the port set to External of the local
storage system.
The capacity is not enough (capacity is less than about 38 MB (77,760 blocks) .
The cable for the switch is not connected appropriately.
The zoning for the switch is not set appropriately.
If none of the above corresponds to the actual factor, disconnect the cable between
the local storage system and the external storage system once and connect it
appropriately again. After 30 seconds, retry the operation.
The external
Remove the error and retry the operation.
volume is
The reason for the error could be as follows:
blocked.
All the set paths are blocked (paths are not connected).
The attribute of external volume is not set to Read/ Write attribute.
The external volume is blocked by error.
The Check
Click Refresh (
Paths &
Status: Enable button is displayed. If the device status remains as Checking
Restore
even though you have updated the information, execute the Check Paths &
Volume
Restore Volume command again.
command is
If the same problem persists despite retrying, call the Hitachi Data Systems
executed and
Support Center.
you have waited
more than 10
minutes, but the
status of the
device does not
change from
Checking.
Hitachi Universal Storage Platform V/VM Universal Volume Manager User's Guide
Corrective Action
Status: The reply of the external storage system was Unavailable.
The external storage system demands to change the connected port.
Once the status becomes Unavailable, the primary path is changed
to the alternate path that is in the Standby status. When the primary
path has been changed, the status of the path becomes Normal.
Reaction: If the path is not changed over properly, check the status
of the external storage system. If you cannot restore the path, call
the Hitachi Data Systems Support Center.
Status: The reply of the external storage system was Backoff. The
status of the path is waiting for recovery because a temporary error
has occurred in the volume of the external storage system. Even if
the status of the primary path becomes this status, the primary path
is not changed to the alternate path immediately. After the error
recovery, the status becomes Normal.
Reaction: If the status cannot be recovered from the error, the path
status is changed to another status. React to the new path status
after the status is changed. If you cannot restore the path, call the
Hitachi Data Systems Support Center.
) command on the Storage Navigator main window while the
Troubleshooting
8-5
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