Troubleshooting port and volume discovery problems

Universal Volume Manager User Guide

Version

9.8.6

Audience

anonymous

Part Number

MK-98RD9016-12

The following table shows corrective actions you can take for port and volume discovery problems. If you cannot resolve the issue, contact customer support.

Problem	Corrective action
The port on the local storage system and port on the external system are not connected.	Connect the external port of the local system and the external system port.
The cable for the switch is not connected correctly, or the switch's port is blocked.	Connect the cable to the correct port on the switch. Or change the port status to Normal status.
Zoning for the switch is not set appropriately.	Make sure the zoning configuration allows the external port of the local system to communicate with the external system port.
External volume returned RESERVATION CONFLICT.	Release the reserved state of the external volume.
Port security is set on the external system.	Cancel the port security setting or change the security of the external system so that the local system can access the port of the external system.
No LU is configured on the external system port.	Configure an LU on the port.
External volume capacity is less than the supported capacity for Universal Volume Manager.	Perform one of the following: Increase the external volume's capacity to be equal or larger than the supported capacity. Use a security function or delete the LU setting from the external system port so that the local system cannot recognize a volume with insufficient capacity.
The external volume is configured as a management LU.	If a management LU, such as Universal Xport LU, is configured on the external system port, perform one of the following: Make sure that at least one LU is used for data storage and has a smaller LUN than the management LU's LUN. Also make sure that the data storage LU is set to the port connected to the local system. Delete the management LU from the port connected to the local system. Use a security function and configure the access attribute of the management LU to prohibit read and write operations.
Remote command devices of the external system are cascaded.	Perform one of the following: Change the configuration so that the remote command devices are not cascaded. Use a security function or delete the LU setting from the port of the connected external system so that the local system cannot recognize the remote command devices.
External system information retrieved by port discovery is not found in the profile information.	Perform one of the following: Connect an external system supported by Universal Volume Manager. Contact customer support to ask if the external system is supported by Universal Volume Manager. If the system is supported, install the firmware version that supports the external system or install the profile information of the external system.
Login to the external system failed.	Perform one of the following: Make sure that the port status of the external system is Normal. Register the WWN to the external system to allow login from the local system.
The external volume is not in Normal status, or a failure or error occurred in retrieving information from the external system.	Make sure that the status of the external system or the external volume is Normal.
The external storage system is connected by using a route that cannot be used as an external path.	When the non-Hitachi external storage system is connected, do not use the following route for the external path: The route being used for I/O path for which a port on the external storage system is defined as a source port and a port on the local storage system as a target port. Connect the external storage system by using routes other than the above.
(VSP 5000 series) The external system is not connected to the Bidirectional port on the local system.	Connect the external system to the bidirectional port of the local system. If necessary, change the local system port setting to Bidirectional.
The external storage system is connected by using a route being used for an external path (when the Hitachi storage system connects the local storage system as the external storage system) or a remote path.	Perform the operations by using HDvM - SN or run the command without specifying the -safety_check enable option from CCI. Caution: If this operation is performed, the host I/O performances or the remote copy performances for the external volumes that use the route might be temporarily degraded. Change the route to the one that is not being used for an external path or a remote path, or verify that the temporary performance degradation does not cause any problem before the operation.

If none of the actions suggested in the table provide volume discovery, remove the cable connection between the local and external storage systems, and then reconnect the storage systems. After 30 seconds, retry the operation.