Network Shared Disks

View the information that is shown about Network Shared Disks (NSDs) in file storage systems.

A Network Shared Disk (NSD) is a logical grouping of storage disks in a network on file storage systems.

View the hover help for information about the values that are shown about quotas. Additional information is provided about the following column headings:
Acknowledged
Shows whether a user marked the status of an NSD as acknowledged. An acknowledged status indicates that the status was reviewed and is either resolved or can be ignored. An acknowledged status is not used when the status of related, higher-level resources is determined.
For example, if the status of the NSD is Error, then the status of the related storage system is also Error. If the Error status of the NSD is acknowledged, then its status is not used to determine the overall status of the related storage system. In this case, if the other internal resources of the storage system are Normal, then the status of the storage system is also Normal.
Available Capacity (GiB)
The amount of storage capacity that is available, but not allocated, on the NSD.
Correlated Storage Systems
Correlated storage systems are storage volumes that are configured to use the information that is contained on an NSD. If only one storage system is correlated to an NSD, the name of the storage volume is provided. If multiple storage volumes are correlated, the number of storage volumes is provided.
Correlated Storage Volume
The name of the volume that provides storage to the NSD. For IBM Storage Scale, the correlated volume is on a back-end storage system.
Custom Tags 1,2, 3
Any user-defined text that is associated with the NSD. The text that is added can be included in reports that are generated about the NSD. To edit the custom tags for the NSD, right-click the NSD in the list and click View Properties. In the properties notebook, click Edit.
Failure Group
The failure group ID for NSDs that share a common point of failure.
File System
The name of the file system on the NSD or the number of file systems on the NSD.
NSD Servers
This information is available only for IBM Storage Scale storage systems. An NSD server is a cluster node that is physically connected to the NSD and provides access to the NSD for other cluster nodes.

The number of cluster nodes that are configured as NSD servers for the NSD is shown. If only one NSD server is configured, the name of the cluster node is shown. If the column is blank, the NSD does not have an NSD server and all the cluster nodes must be physically connected to the NSD.

If the NSD server is disconnected from the NSD, the cluster nodes that access the NSD through the NSD server might lose their connection unless redundant NSD servers are configured.

Status
The status of the NSD such as normal, warning, error, or unknown. Use the status to determine the condition of the NSD, and if any actions must be taken. For example, if the NSD has an error status, take immediate action to correct the problem.
For IBM Storage Scale, an Error or Warning status might be due to a connection problem between one of the NSD servers and the NSD. To check the status of the NSD server connections, click the NSD row, select View Properties, and click the NSD Servers tab. The Connectivity column shows the status of the connection. Alternatively, if the NSD does not have an NSD server, the Error or Warning status might be due to a connection problem between the NSD and one of the cluster nodes.
Type
The type of information that is stored on the NSD. The following values might be shown:
  • Data
  • Metadata
  • Data, Metadata. The NSD contains both data and metadata.
  • File System Descriptor. The NSD contains only a copy of the file system descriptor.
  • Local Cache. The NSD is used by the cluster node as a local cache to enable efficient access to data.