Troubleshooting external path status

The following table shows path statuses in the View External LUN Properties window. Descriptions and corrective actions you can take are provided.

Also, see Troubleshooting path errors for specific storage systems.

Status

Description

Corrective action

Unknown

The path status cannot be determined.

Call Hitachi Data Systems customer support.

Blockade

The port connected to the external storage system is blocked.

The port is blocked because of firmware replacement, package replacement, or other factor. Check the status of the local storage system. If you cannot restore the path, call Hitachi Data Systems customer support.

External device setting changed

An external system setting has changed. For example, the path definition was deleted, or the external system itself was replaced by another device.

The port of the external system is recognized. See your device manufacturer's documentation to verify that the settings on the volumes in question have not changed.

LDEV size reduced

The external volume capacity was reduced.

Check the external volume capacity. Delete the external volume, and then remap to it.

Not ready

The reply of the external system was NOTREADY. Either the drive is spinning up or the system is being formatted.

The path cannot be used to access the external system. Check the status of the external system. If you cannot restore the path, call Hitachi Data Systems customer support.

Illegal request

The reply of the external system was ILLEGALREQUEST. The command cannot be executed to the external system. Data protection may be set on the external system.

The external system port is recognized. Check the external system settings. If you cannot restore the path, call Hitachi Data Systems customer support.

Command aborted

The reply of the external system was ABORTEDCOMMAND. An error may have occurred on the external system side.

The external system port is recognized. Check external system settings and the physical connection to the external system (cables and switches). If you cannot restore the path, call Hitachi Data Systems customer support.

Busy

The external system is in the BUSY status.

The external system port is recognized. Check whether the external system configuration causes excessive load on the system. If you cannot restore the path, call Hitachi Data Systems customer support.

Response error

The external system is in blocked status caused by an abnormal reply (Response). You may not be able to access the system, or data protection may be set.

The external system port is recognized. Check the setting and status of the external system. If you cannot restore the path, call Hitachi Data Systems customer support.

Initiator port

The port attribute of the external system has been changed to “initiator”.

Set the port attribute of the external system to “target”. If you cannot restore the path, call Hitachi Data Systems customer support.

Destage Failed

The writing of data from cache memory to the external volume failed.

Reconnect the external volume or system. When status is Normal, disconnect the volume or system. You may need to try this multiple times. If the problem remains, call Hitachi Data Systems customer support.

Unknown port

The port attribute of the external system is unknown.

The external system port is recognized. Check external system settings and the physical connection to the external system (cables and switches). If you cannot restore the path, call Hitachi Data Systems customer support.

Cannot detect port

The external path has been removed or the external system port cannot be found. Possible causes are:

  • The fiber cable is not properly connected.

  • The topology does not match between the ports connected to the external storage system and target ports.

  • Because security is set on the port, the external system cannot be recognized from the local system.

  • If the external system is connected through switches, the switch setting may be incorrect.

If you cannot restore the path after checking the possible causes, call Hitachi Data Systems customer support.

Internal error

A program error occurred, or there is a logical contradiction.

Call Hitachi Data Systems customer support.

Timeout

Processing was retried because of an abnormal reply; however, processing was stopped because of timeout.

The external system port is recognized. Check external system settings and the physical connection to the external system (cables and switches). If you cannot restore the path, call Hitachi Data Systems customer support.

Device check error

An external volume is mapped, but you cannot access the volume in the external system.

Check the volume’s status in the external system and take any necessary corrective action.

Format the volume if it is not formatted.

Medium error

The external volume has become inaccessible.

Check the volume’s status in the external system and take any necessary corrective action.

Format the volume if it is not formatted.