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# View port group details

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.

## Steps

1. Select the storage system.
2. Select Hosts > Port Groups.
3. Select the port group and click .
4. Use the port groups details view to view and manage a port group.

   The following properties display:

   Name—User-defined port group name.

   Ports—Number of ports in the group. Click the number for more details.

   Masking Views—Number of masking views where the port group is associated. Click the number for more details.

   Last Update—Timestamp of the most recent changes to the port group.

   Host I/O (IO/Sec)—Total host I/O limit on the specified port group in I/O /Sec. Zero indicates that there is no limit set.

   Host I/O (MB/Sec)—Total host I/O limit on the specified port group in MB/Sec. Zero indicates that there is no limit set.

   Port Speed (MB/Sec)—Bandwidth in MB/Sec for that port group (that is, the aggregated port negotiated speed for the ports in the group).

   Percent Capability (%)—Percentage of the bandwidth demand over the port group negotiated speed.

   Excess (MB/Sec)—Amount of bandwidth in MB/sec that is left available on the port group after the host I/O limits have been accounted for.

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