Navisphere Command Line Interface (CLI) Reference - VMware Communities

Basic Commandsbackendbus -analyze (CX3 series only)Displays speed and state information for each back-end bus andthe devices on the back-end busDescriptionThe naviseccli backendbus command with the -analyze function,displays the current and maximum back-end bus speeds for eachback-end bus on the storage system, and each device (enclosures,disks, and link control cards (LCCs)) on the back-end bus. It also listsstate information that includes whether a device on the bus islimiting and whether the storage system meets conditons required fora reset (see the list of conditions later in this section).The current speed indicates the speed a bus or device is currentlyrunning at; the maximum speed indicates the highest speed a bus ordevice is capable of running at. If a device is limiting, it has amaximum speed lower than the maximum speed of the back-endbus. If you have a limiting device, a reset will not occur when youissue backendbus -resetspeed.When you run backendbus -analyze, a summary analysis appearsfor each back-end bus to indicate whether a reset operation will besuccessful for the back-end bus. One of the following summaryresults will appear for each back-end bus:Summary analysis aSpeed may change on rescanSpeed will change on rescanSpeed will not change on rescanDescriptionA speed-related fault exists on the back-endbus (see Description section).The CLI cannotdetermine whether a reset will occur.A reset will occur.There are limiting devices on the back-endbus. A reset will not occur.a. If a limiting device or speed-related fault exists on the back-end bus, a listing of the limitingdevices and speed-related faults appear before the summary analysis. Devices withspeed-related faults appear as Devices Requesting Bypass.A speed-related fault can occur when you add a device to a back-endbus that has a maximum speed lower than the current speed of thebus. A device with a speed-related fault appears with unknownspeed values; therefore, the CLI cannot determine if a reset will occur.66 EMC Navisphere Command Line Interface (CLI) Reference