EMC DS-4900B Hardware Reference Manual page 41

Installing and Configuring the DS-4900B
EMC recommends backing up the configuration on a regular
basis to ensure that a complete configuration is available as
backup. For specific instructions about how to back up the
configuration, see the Fabric OS Administrator's Guide. The
switchShow, fabricShow, and configUpload commands are
described in detail in the Fabric OS Command Reference Manual.
2-17
Initial setup of the DS-4900B