Nodes, modules, and directors

View the information that is shown about nodes, spare nodes, modules, and directors in block storage systems.

The type of the storage system determines which of these components can be viewed. For example, the Nodes tab is renamed Directors for VMAX storage systems.

The following information is shown for the nodes or modules in the storage system:
Acknowledged
Shows whether a user marked the status of a node or module 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 a node is Error, then the status of the related storage system is also Error. If the Error status of the node is acknowledged, then its status is not used to determine the overall status of the 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.
Compression
The compression level of a node is inherited from the associated I/O group. Possible values are listed.
Unsupported
Indicates that the associated I/O group does not support compressed volumes or nodes are down-level for supporting compressed volumes.
Supported
Indicates that the associated I/O group supports compressed volumes.
Active
Indicates that the associated I/O group is compression active, and contains at least one compressed volume.
Availability: Nodes on storage systems that run IBM Storage Virtualize. These nodes support Random Access Compression Engine (RACE) compression for volumes in standard pools.
Configuration Node
Indicates whether a node is a configuration node. This value is set to Yes if the node is the only node in the cluster.
Enclosure
The enclosure that is associated with the canister node. A node can be associated with a single enclosure only.
FC Ports
The number of Fibre Channel ports that are on the node or module.
I/O Group
The display name of the I/O group in which the node is a member.
IP Ports
The number of Internet Protocol ports that are on a node.
Read Cache (GiB)
The amount of read cache memory that is available on the node.
Spare Nodes
The nodes that are available as spares for a node.
Availability: Storage systems that are running IBM Storage Virtualize 8.1.0 or later.
Status
The status of the node or module. Use the status to determine the condition of the storage resource, and if any actions must be taken. For example, if a node has an Error status, take immediate action to correct the problem.
Write Cache (GiB)
The amount of write cache memory that is available on the node.
WWN
The worldwide network name of the node.
Site
The physical location of the node in a stretched cluster. The site column is blank if no site is configured.