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# Modify hosts

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

## Steps

1. Select the storage system.
2. Select Hosts > Hosts .
3. Select the host and click Modify to open the Modify Host dialog box.
4. To change the Host Name, select it and type a new name over it
   Host 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 names are case-insensitive.
5. Select the Fibre radio button to filter the available hosts table to display Fibre Channel hosts only, select the iSCSI radio button to filter the table to display iSCSI hosts only, or select the NVMe/TCP radio button to filter the table to display NVMe/TCP hosts only. The Fibre radio button is selected by default.
6. Select one or more initiators and click to add the selected initiators to the host.
7. Click the button to the right of Initiators in Host to add an initiator. Type the Initiator name and select OK.
8. Do one of the following:
   - Click Run Now to perform the operation now.
   - Expand Run Now and click Add to Job List to add this task to the job list, from which you can schedule or run the task at your convenience. For more information, see Schedule jobs and Preview jobs.