Use the Viewing Managed Disk Groups panel in the SAN Volume Controller Console to
display all the MDisk groups that belong to a cluster.
Attributes
- Select
- Allows you to select an MDisk group to work with.
Note: Only one
row can be selected at a time.
- Name
- Displays the name of an MDisk group.
- State
- Displays the state of the MDisk group. The state can be one of
the following conditions:
- Online
- Indicates that the MDisk group is online and available. All the
MDisks in the group are available.
- Degraded Paths
- Indicates that the one or more MDisks within the group are 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 one or more MDisks within the selected MDisk group. 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.
- Offline
- Indicates that the MDisk group is offline and unavailable. If
all the MDisks are missing from the group, their status is either
offline or excluded.
- MDisk Count
- Displays the number of MDisks in the group.
- VDisk Count
- Displays the number of virtual disk (VDisk) copies that have been
created from this group.
- Capacity (MB)
- Displays the total disk capacity in the MDisk group.
- Extent Size (MB)
- Displays the size of the extents in the MDisk group.
- Free Space (MB)
- Displays the amount of free space, in MB, that is
in this MDisk group. The space equals the total capacity that is available
for creating new VDisks.
- Virtual Capacity (MB)
- The total virtual capacity of all the VDisk copies
in the MDisk group. If you have configured space-efficient VDisk in
the MDisk group this value can be different to the real capacity and
the used capacity.
- Used Capacity (MB)
- Displays the total used capacity of all the VDisk
copies in the MDisk group.
- Real Capacity (MB)
- Displays the total real capacity of all the VDisk
copies in the MDisk group.
- Overallocation
- Displays the ratio of virtual capacity to
real capacity, as a percentage.
- Warning
- Displays the warning level for this MDisk group.
When the percentage of extents that are used in the MDisk group exceeds
this level, a warning is issued. If this value is set to zero, the
warning feature is disabled.
Actions
You
can select one of the following tasks from the task list:
- Create an MDisk Group
- Rename an MDisk Group
- Delete an MDisk Group
- Add MDisks
- Remove MDisks
- Show MDisks in This Group
- Show VDisks Using This Group
- Show Capacity Information
Note: With the exception of the Create an MDisk Group task,
you must first select an MDisk group before you can select a task.
- Go
- Click this button after selecting a task from the task list. Clicking Go launches
the panel for the task that you selected.
- Refresh
- Click this button to refresh the table with changed values.