Deleting managed disks from a managed disk group

Introduction

It can take some time for the MDisk to be removed. The time it takes depends on various factors, such as the number of MDisks that are removed from the group and the number of the extents that are required to be migrated.

Removal of an MDisk decreases the total capacity of the MDisk group. For example, if the MDisk total capacity size is 100 GB and the capacity warning level is set at 60%, a warning is issued when the used capacity reaches 60 GB. If a 50 GB MDisk is removed from the MDisk group, the total capacity of the MDisk group decreases to 50 GB, and the capacity warning level is decreased proportionately to 30 GB, which is 60% of 50 GB. If there is currently a used capacity of 35 GB on the MDisk group, when the MDisk group decreases its capacity due to the removal of the MDisk, a warning is issued because the used capacity has decreased below the specified warning level.

Attributes

The following attributes are displayed in the table:

Select

Allows you to select an MDisk to remove from the MDisk group.

Note: Only one row can be selected at a time.

Name

Displays the names of the MDisks that are in the selected MDisk group.

State

Displays the state of the MDisk. The following values are possible:

Online

Indicates that the MDisk is online and available. All paths to the MDisk are available.

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. 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 selecting the Include an MDisk task from the Viewing Managed Disks panel.

Offline

Indicates that the MDisk is offline and unavailable. All paths to this MDisk have been lost.

Capacity

Displays the capacity of the MDisk in megabytes (MB).

Actions

The following actions are available:

OK

Click this button to delete the MDisk from the MDisk group.

Cancel

Click this button to exit the panel without deleting the MDisk from the MDisk group.