General troubleshooting

Universal Volume Manager User Guide

Version: 9.8.6
Audience: anonymous
Part Number: MK-98RD9016-12

Check the following table for the problem. After resolving an error, retry the operation. If you cannot resolve the issue, contact customer support.

Symptom	Possible causes and troubleshooting steps
Hitachi Device Manager - Storage Navigator cannot access an external volume.	An error occurred in the switch, or the switch is off. A cable between the local and external system is not connected properly. The external volume was deleted in the external system. An error occurred in the external volume. The path is changed in the external system. The port attribute in the local storage system is changed. Topology information is not properly set.
An external volume cannot be mapped.	The number of mapped volumes exceeds the maximum number available for the local storage system. There are not enough LDKC:CU:LDEV numbers available for external volume mapping.
An external volume cannot be deleted.	Forcibly delete external volumes if you cannot disconnect the external storage system or external volumes due to causes, such as removing the external storage system before you delete external volumes. To forcibly delete external volumes, select Yes for "Do you want to execute the Delete External Volumes operation without writing the cache data to the volumes?" For details about the procedure, see Deleting an external volume mapping (on page 88).
An external path is blocked.	See the preceding problem, "Device Manager - Storage Navigator cannot access the external volume". If the problem persists after correcting any errors, continue to step 2. Confirm that the cables between the local and external systems are connected properly. If the cables are properly connected, disconnect and then reconnect them. After 30 seconds, check the path status.
Action is required for a path status in the View External LUN Properties dialog box.	See Troubleshooting external path status.
The volume in the external system cannot be found even after port discovery or volume discovery was performed.	Follow any instructions given in the error message or messages and then retry the operation. If the problem persists, see Troubleshooting port and volume discovery problems.
As a result of the port discovery, the external storage system displayed as Unknown is added to External storage system, and the external storage system is not recognized.	The external storage system is connected by using a route that cannot be used as an external path. See Troubleshooting port and volume discovery problems.
The external volume is blocked.	All external paths are blocked (paths are not connected). The external volume is not set to Read/Write. The external volume is blocked by an error.
The status of the external volume is Blockade.	When errors occur in all external paths, the local storage system changes the status of the external volume to Blockade. Reconnect the volume or storage system. If the volume's status still does not change to Normal, restore the path as described in the preceding problem, "The external path is blocked", and then reconnect the volume again.
The ? sign displays in the LUN ID (Highest Priority) column of the Discovered External Volumes table in the Add External Volumes window.	A corresponding external volume was not found for the external path with the highest priority. Look for problems with the connection to the external system that failed during volume discovery. Fix any problems, and perform the operation again.
External volume discovery was not completed because of failure.	Look for problems with the connection to the external system; also verify that the external volume is correctly configured in the external system. Fix any problems, and then perform the operation again. If the error message indicates "An external volume that can be added was not found by the result of Volume Discovery. (error code: 00622-105241)", the external volume discovery might have failed because the external storage system is connected by using a route that cannot be used as an external path. See Troubleshooting port and volume discovery problems.
After reconnecting an external volume or system, 10 minutes have passed but the status has not change from Checking.	Click Refresh on the Device Manager - Storage Navigator main window. If the status remains Checking, perform the reconnect operation again.
After disconnecting an external volume or system, the status does not change.	Click Refresh on the Device Manager - Storage Navigator main window. Note that the time required for write processing from cache to the external volume depends on volume capacity. More time is required for larger volumes. Processing speed is about 20 MB/s. However, the processing speed also depends on the performance and status of the external storage system.
(VSP 5000 series) A message saying that intervention is required is issued to the mainframe host.	The device status is currently changing. Wait a few minutes, and then check the status again. When the transition of the device status has completed normally, the device can be used immediately. If the device is blocked as a result of the status transition, see the row "The external volume is blocked." above.
(VSP 5000 series) A message saying that the device is blocked is issued to the mainframe host.	See the row "The external volume is blocked." above.
When setting the -safety_check enable option to run the following CCI command, `Unknown` is displayed for VENDOR_ID and PRODUCT_ID: raidcom discover external_storage When setting the -safety_check enable option to run the following CCI command, a volume on the external storage system cannot be displayed: raidom discover lun When setting the -safety_check enable option to run the following CCI commands, the command cannot run: raidcom add externalgrp raidcom add path	Take one of the following actions: If you use the non-Hitachi external storage system, change the route to the one that can be used for an external path. If you use the Hitachi external storage system, the external storage system might be connected by using the following routes. Take the actions in Troubleshooting port and volume discovery problems. A route being used for an external path (when the Hitachi storage system connects the local storage system as the external storage system). A route being used for a remote path.
External target port discovery failed with error code: 00605-008966.	The DKCMAIN microcode version and the Device Manager - Storage Navigator software version might not match with each other. Check the versions. If they do not match with each other, update the DKCMAIN microcode version, and then retry. If the same symptom occurs when the versions match with each other, contact customer support.