This is the Relative Name (RN) of a SES enclosure object: the single naming component that, combined with its parent's DN, distinguishes this SES enclosure from any sibling instances under the same parent. Admins rarely read the RN by itself, but UCS Manager and management tools use it to build and parse the full DN path so each instance of a SCSI Enclosure Services (SES) object representing a physical disk/storage enclosure such as a JBOD or expander tray that UCS Manager monitors over the SES protocol can be addressed uniquely. For instance, when a storage enclosure has several SES enclosures attached, the RN is the piece that differs between their otherwise-identical parent DNs, letting a script enumerate all of them.