Navisphere Command Line Interface (CLI) Reference - VMware Communities

Basic Commandsbackendbus -resetspeed (CX3 series only)Resets the back-end bus speeds for a storage systemDescriptionThe naviseccli backendbus command with the -resetspeed function,resets the back-end bus speed for the buses on the storage system.When you execute backendbus -resetspeed, if the back-end bus iseligible for a reset and the storage system meets the conditionsrequired for a back-end bus speed reset, the reset occurs. See the tablebelow for the steps you should take before issuing backendbus-resetspeed.Note: This is a disruptive operation and can take several minutes tocomplete. During this time the storage system will be offline and no I/O willbe performed.Before you execute a reset, run backendbus -analyze to verify thecurrent and maximum speeds of each back-end bus and device todetermine if limiting devices exist, which will prevent a reset, and toverify that your storage system meets the conditions required for areset.To verify whether the back-end bus speed reset occurs, capture theoutput from backendbus -analyze or backendbus -get -speedsbefore you execute the reset, to compare to the reset back-end busspeed values after you issue the reset.Steps to take before issuing a reset1 Run backendbus -analyze to verify the following:• back-end bus and device speed information• no limiting devices exist on the back-end bus• storage system meets required conditions2 Save the output from backendbus -analyze or backendbus-get -speeds, to compare the bus speed in the saved output tothe bus speed after you initiate backendbus -resetspeed,Syntaxbackendbus -resetspeed is used with naviseccli (described onpage 37) as follows.backendbus -resetspeed76 EMC Navisphere Command Line Interface (CLI) Reference