Use the Viewing MDisk Group Details panel in the SAN Volume Controller Console to
display information about a selected MDisk group.
Attributes
The
following attributes are displayed in the table:
- ID
- Displays the system-assigned ID for the MDisk group.
- Name
- Displays the name of the MDisk.
- State
- Displays the current state of the MDisk group. The state can be
one of the following values:
- Online
- Indicates that the MDisk group is online and available and that
all the MDisks in the group are available.
- Degraded
- Indicates that the MDisk group is available, but one or more MDisks
in the group are in the Degraded state.
- Offline
- Indicates that the MDisk group is offline and unavailable, because
at least one MDisk in the group is offline or excluded.
- MDisk Count
- Displays the number of MDisks that are assigned to this group.
- VDisk Count
- Displays the number of virtual disks (VDisks) that have been created
from this group.
- Capacity
- Displays the size of the MDisk group. The size equals the total
capacity of all the MDisks that are assigned to this group. If the
capacity is less than one gigabyte, the capacity is displayed in MB;
otherwise, it is displayed in GB.
Note: The capacity is rounded to
two decimal places.
- Extent Size
- Displays the size of the extents that are allocated in the group.
This value is chosen when the group is created. The following values
are valid:
- 16 MB
- 32 MB
- 64 MB
- 128 MB
- 256 MB
- 512 MB
- 1024 MB
- 2048 MB
- Free Space
- Displays the amount of free space, in MB, that is in this group.
The space equals the total capacity that is available for creating
new VDisks. This is equal to the capacity of all the MDisks that are
in the group minus the capacity of the VDisks created from this group.
- ID
- Displays the system-assigned ID for the MDisk group.
- State
- Displays the current state of the MDisk group. The state can be
one of the following values:
- Online
- Indicates that the MDisk group is online and available and that
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, because
at least one MDisk in the group is offline or excluded.
- Name
- Displays the name of the MDisk.
- MDisk Count
- Displays the number of MDisks that are assigned to this group.
- VDisk Count
- Displays the number of virtual disks (VDisks) that have been created
from this group.
- Displays the number of virtual disk (VDisk) copies that have been
created from this group.
- Capacity
- Displays the size of the MDisk group. The size equals the total
capacity of all the MDisks that are assigned to this group. If the
capacity is less than one gigabyte, the capacity is displayed in MB;
otherwise, it is displayed in GB.
Note: The capacity is rounded to
two decimal places.
- Extent Size
- Displays the size of the extents that are allocated in the group.
This value is selected when the group is created. The following values
are valid:
- 16 MB
- 32 MB
- 64 MB
- 128 MB
- 256 MB
- 512 MB
- 1024 MB
- 2048 MB
- Free Space
- 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
- 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
- Displays the total used capacity of all the VDisk
copies in the MDisk group.
- Real Capacity
- 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
The
following actions are available:
To exit this panel, click Close.