Use the Adding MDisk to an MDisk group panel in the SAN Volume Controller Console to
add managed disks (MDisks) to an MDisk group.
Introduction
MDisks that belong to a group
must be removed from their current group before you can assign them
to a different group. In addition the warning threshold of the MDisk
group is increased in proportion to the size of the MDisk that is
added. The
MDisks Candidates list contains
all of the MDisks in the cluster that have a mode of unmanaged.
Note: The first
time that you add a new solid-state drive (SSD) to
an MDisk group, the SSD is
automatically formatted and set to a block size of 512 bytes.
Attributes
The
following attributes are displayed in the table:
- Select
- Allows you to select the MDisks to add to the MDisk group.
Note: Only
one row can be selected at a time.
- Name
- Displays the name of the MDisk.
- State
- Displays the current 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:
- Verify that the fabric configuration rules for storage systems
are correct.
- Ensure that you have configured the storage system properly.
- 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 . 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 svctask includemdisk CLI command.
- Offline
- Indicates that the MDisk is offline and unavailable. All paths
to this MDisk have been lost.
- Capacity
- Displays the capacity of the MDisk.
Actions
The
following actions are available:
- OK
- Click this button to add MDisks to a group.
- Cancel
- Click this button to exit this panel without adding MDisks.