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 a node has an error status, the related storage system also shows an error condition. If the error status of the node is acknowledged, it changes to Error-Acknowledged. This acknowledged status is then treated as normal, and is used in evaluating the overall condition of the storage system. In this case, if the other internal resources of the storage system are also normal, the storage system condition is considered 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.

Location Code

The unique value that is assigned by the storage system to identify the component. This column is shown for DS8000 storage systems only.

Memory

The amount of raw cache memory that is installed in the node. This column is shown for DS8000 storage systems only.

Processor

The type and configuration of the processor on the node. This column is shown for DS8000 storage systems only.

Read Cache (GiB)

The amount of read cache memory that is available on the node.

Release

The version of the licensed machine code (LMC) or hardware bundle on the node. This column is shown for DS8000 storage systems only.

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.

Note: The columns I/O group, Compression, Site, Type, Mode, Serial Number, WWN, IP Address, Configuration Node, and FC Ports are not available for DS8000 storage systems.