Actions on the Hosts page
On the Hosts page, you can add new hosts, add host clusters, add host ports, or manage host connectivity to fixed block (FB) volumes in the DS8000 storage system. You can also view the properties of a host system, host cluster, or host port.
Host actions
- Create Volumes
- Create one or more volumes across a pool or a pool pair, by specifying the name prefix, quantity
of volumes, capacity, and capacity units (depending on the volume type, fixed block, or CKD). For
CKD volumes, you must also specify the LSS range.
Note: LSS is synonymous with logical control unit (LCU) and subsystem identification (SSID).
You can also assign the new volume to a host or host cluster.
Preset configurations for FB and CKD storage types simplify the process of creating volumes, or you can use the custom mode to control the settings. In preset mode, the storage system automatically distributes the volumes between the two selected pools, one on each node to help balance the processing workload.
- Assign Host Ports
- Assign host ports to a host by identifying the worldwide port names (WWPN) that the host uses to communicate with the DS8000 storage system.
- Assign to Cluster
- Assign a host to a cluster.
The host gains all volume mappings. All volume mappings are merged, but a warning that the merge is about to occur allows you to view the mappings. This function is disabled when mappings conflict.
I/O port masks that do not match between hosts are allowed. However, different host types are not allowed; the cluster inherits host type from assigned hosts.
- Modify LUN Mappings
- Modify the LUN mappings for volumes to hosts that use a SCSI Map
addressing mode.
When you modify LUN mappings of a host, you can modify only private host-mappings. Cluster mappings cannot be modified here.
When you modify LUN mappings of a cluster, you can modify only cluster mappings. Private mappings cannot be modified here.
- Modify Fibre Channel Port Mask
- Modify the Fibre Channel port mask to allow or disallow a Fibre Channel port that the host can use to communicate with the DS8000.
- Rename
- Rename a host as required.
- Unmap All Volumes
- Unmap all of the volumes that are mapped to one or more hosts. The hosts can then no longer communicate with these volumes. You can unmap all volumes from the hosts, for example, when you need to remove the hosts from the configuration or unconfigure the storage system.
- Remove
- Remove a host that you no longer need. A host cannot be removed if any volumes are mapped to it.
- Properties
- View the properties of a host, such as the state and type.
Cluster actions
- Create Volumes
- Create one or more volumes across a pool or a pool pair, by specifying the name prefix, quantity
of volumes, capacity, and capacity units (depending on the volume type, fixed block, or CKD). For
CKD volumes, you must also specify the LSS range.
Note: LSS is synonymous with logical control unit (LCU) and subsystem identification (SSID).
You can also assign the new volume to a host or host cluster.
Preset configurations for FB and CKD storage types simplify the process of creating volumes, or you can use the custom mode to control the settings. In preset mode, the storage system automatically distributes the volumes between the two selected pools, one on each node to help balance the processing workload.
- Create Host
- Configure a host to access the storage system and assign host ports
to the host.
When you add a host, you can also assign it to a cluster.
- Assign Hosts
- Assign a host to a cluster.
The host gains all volume mappings. All volume mappings are merged, but a warning that the merge is about to occur allows you to view the mappings. This function is disabled when mappings conflict.
I/O port masks that do not match between hosts are allowed. However, different host types are not allowed; the cluster inherits host type from assigned hosts.
- Rename
- Rename the cluster.
- Unassign All Hosts
- Unassign a host from a cluster.
- Remove
- Remove the cluster. Note that all hosts must be unassigned from the cluster before you can remove it.
- Properties
- Display the properties of the cluster.
Host port actions
- Unassign
- Remove the connection between one or more host ports and the host. After a host port is unassigned, the host can no longer send commands through the host port to volumes on the storage system.
- Properties
- View the properties of a host port, such as the state or host.