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# Rename hosts or host groups

Storage hosts are systems that use storage system LUN resources. A logical unit number (LUN) is an identifier that is used for labeling and designating subsystems of physical or virtual storage.

## Prerequisites

See Roles and associated permissions to determine the user roles that can perform this task.

## About this task

To rename host or host groups:

## Steps

1. Select the storage system.
2. Select Hosts > Hosts.
3. Select the host or host group and click Modify.
4. In the Properties panel, type a new name for the host or host group and click Apply.
   Host or host group names must be unique from other hosts or host groups on the storage system and cannot exceed 64 characters. Only alphanumeric characters, underscores ( _ ), and (-) are allowed. Host or host group names are case-insensitive.