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# Host Management

Storage hosts are systems that use storage system LUN resources. Unisphere manages the hosts.

Host Management covers the following areas:

- Management of host and host groups
- Management of masking views - A masking view is a container of a storage group, a port group, and an initiator group , and makes the storage group visible to the host. Devices are masked and mapped automatically. The groups must contain some devices entries.
- Management of port groups - Port groups contain director and port identification and belong to a masking view. Ports can be added to and removed from the port group. Port groups that are no longer associated with a masking view can be deleted.
- Management of initiators and initiator groups - An initiator group is a container of one or more host initiators (Fibre or iSCSI). Each initiator group can contain up to 64 initiator addresses or 64 child IG names. Initiator groups cannot contain a mixture of host initiators and child IG names.
- Management of PowerPath hosts
- Management of mainframe configured splits, CU images, and CKD volumes

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