Viewing managed disk details

Attributes

The following attributes are displayed in the table:

ID

Displays the system-assigned ID for the MDisk.

Name

Displays the name of the MDisk.

State

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

Online

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

Mode

Displays the mode that is assigned to this MDisk. The mode determines how the cluster uses the MDisk. The following modes are possible:

Unmanaged

Indicates the MDisk is not used by the cluster.

Managed

Indicates the MDisk is assigned to an MDisk group and is providing extents that virtual disks (VDisks) or VDisk copies can use.

Image

Indicates the MDisk is assigned directly to a VDisk or VDisk copy with a one-to-one mapping of extents between the MDisk and the VDisk or VDisk copy.

MDisk Group ID

Displays the system-assigned ID of the MDisk group that this MDisk is assigned to. The MDisk group ID applies only to MDisks that are in managed or image mode.

MDisk Group Name

Displays the name of the MDisk group that this MDisk is assigned to. The MDisk group name applies only to MDisks that are in managed or image mode.

Capacity

Displays the size of the MDisk.

Quorum Index

Displays the number that is assigned to this quorum disk. The number can be either: 0, 1, or 2. You can assign an MDisk a specific index number or the system can assign one.

Active Quorum Disk

Displays whether the quorum disk is the active quorum disk. The active quorum disk is the disk which is used first in the event of a cluster partition. You should set an active quorum disk when nodes in an I/O group are split between different physical locations to ensure that the most highly-available quorum disk is used.

The following values are possible:

Yes

Indicates that the quorum disk is used first in the event of a cluster partition.

No

Indicates that the quorum disk is not used first in the event of a cluster partition.

Block Size

Displays the physical block size for the underlying MDisk; that is, the number of bytes in a block on the disk, usually 512.

Controller ID

Displays the system-assigned ID of the controller for this MDisk.

Controller Name

Displays the name of the disk controller system that contains the MDisk.

Controller Type

Displays the device type of the RAID controller. The following values are possible:

4

Indicates a storage controller device type that is not a solid-state drive (SSD) attached inside a node.

6

Indicates a device type that is a solid-state drive (SSD) attached inside a node.

Controller Worldwide Node Name (WWNN)

Displays the WWNN of the RAID controller.

Controller LUN Number

Displays the LUN number assigned to the MDisk by the RAID controller. For example, the first RAID array created on a controller will be 0, the second RAID array will be 1.

Preferred WWPN

Displays the preferred WWPN for this MDisk.

Active WWPN

Displays the active WWPN for this MDisk.

Path Count

Displays the number of nodes through which the MDisk is currently accessible.

Maximum Path Count

Displays the highest value that the Path Count has reached since the MDisk was initially discovered or since the MDisk was last accessible through all nodes in the cluster.

UID

Displays the 32-byte hex string value for this MDisk.

Node ID

Displays the system-assigned identifier for the node that contains the solid-state drives (SSDs).

Node Name

Displays the name of the node that contains the SSD.

Node Location

Displays the name of the slot that contains the SSD on the node.