Viewing the MDisk status

You must view the status of managed disks (MDisks) as part of the repair verification procedures.

This task assumes that you have already launched the SAN Volume Controller Console.

When all SAN Volume Controller repairs are complete, all MDisks are shown as online. Any MDisks that have the statuses of offline, degraded path, degraded port, or excluded might contain errors or are not recognized because of a problem with the SAN environment. If problems still exist on MDisks after the repair actions on the SAN Volume Controller are complete, resolve the disk drive or SAN problems and then perform repair verification for the SAN Volume Controller to verify that no other problems exist.

Complete the following steps to view the status of MDisks:

Click Work with Managed Disks > Managed Disks from the portfolio. The Viewing Managed Disks panel is displayed.
Ensure that all MDisks are online. In addition to the online status, the MDisk can have the following status values:
Degraded Paths
Indicates that the MDisk is not accessible to one or more nodes in the cluster. Degraded path state is most likely the result of incorrect configuration of either the disk controller or the fibre-channel fabric. However, hardware failures in the disk controller, fibre-channel fabric, or node could also be a contributing factor to this state. Complete the following actions to recover from this state:
1. Verify that the fabric configuration rules for storage systems are correct.
2. Ensure that you have configured the storage system properly.
3. Correct any errors in the error log.
Degraded Ports

Indicates that one or more 1220 errors have been logged against the selected MDisk. The 1220 error indicates that the remote fibre-channel port has been excluded from the MDisk. This error may cause reduced performance on the storage controller and usually indicates a hardware problem with the storage controller. To fix this problem you must resolve any hardware problems on the storage controller and fix the 1220 errors in the error log. To resolve these errors in the log, select Service and Maintenance > Run Maintenance Procedures in the SAN Volume Controller Console. On the Maintenance Procedures panel, select Start Analysis. This action displays a list of unfixed errors that are currently in the error log. For these unfixed errors, select the error name to begin a guided maintenance procedure to resolve these errors. Errors are listed in descending order with the highest priority error listed first. Highest priority errors should be resolved first.

Excluded

Indicates that the MDisk has been excluded from use by the cluster after repeated access errors. Run the directed maintenance procedures to determine the problem. You can reset an MDisk and include it in the cluster by running the include task.

Offline

Indicates that the MDisk cannot be accessed by any of the online nodes. That is, all of the nodes that are currently working members of the cluster cannot access this MDisk. This state can be caused by a failure in the SAN, storage system, or one or more physical disks connected to the storage system. The MDisk is reported as offline if all paths to the disk fail.