Viewing and Setting Controller Policieswww.3ware.com 117Viewing and Setting Controller PoliciesThe following controller-wide policies can be adjusted as appropriate for yourequipment. Export JBOD (unconfigured) disks. This setting indicates whetherJBOD disks should be exported to the operating system. JBODconfiguration is strongly discouraged for newly added disks on the 9000series controller, in favor of Single Disk, so by default, this setting isdisabled. If you have a JBOD configuration from a 7000/8000 controllerthat you want to use on the 9000 controller, you should enable this setting.This policy can only be set in 3BM and CLI. Staggered spinup. Spinup allows drives to be powered-up into theStandby power management state to minimize in-rush current at power-upand to allow the controller to sequence the spin-up of drives. Compatibledrives are sent a spin up command as defined by the Number of drivesper spinup and Delay between spinup settings. These policies can onlybe set in 3BM and CLI. Number of drives per spinup. Number of drives that will spin up atthe same time when the controller is powered up, if staggered spinupis enabled. From 1 to x, depending on the number of ports on thecontroller. Delay between spinup. The delay time (in seconds) between drivegroups that spin up at one time on this particular controller, ifstaggered spinup is enabled. Disable write cache on degraded array. For 9500S controllers,indicates whether write cache will be automatically disabled on a unit if itbecomes degraded. (This option does not apply to 9550SX controllers; itis integrated into the StorSave policy.)When Yes, the unit write cache and the disk drive write cache will bedisabled if the unit degrades. This setting has no effect on non-redundantarrays. Write cache will be automatically re-enabled when the unit returnsto normal.When No, the unit and disk drive write cache will remain enabled (if it isenabled), in the event that the unit degrades. Staggered method. Indicates whether the type of staggered spinup isATA-6 or SATA OOB (Out Of Band). By default, when Staggered Spinupis enabled, the ATA-6 scheme is used. If your drives support the SATAOOB method, select that method in 3BM. There is no electronic methodfor the controller to know if a drive supports this method, so it must be setmanually. For staggering to work properly, the drives must support theselected method. This policy can only be set and only shows in 3BM. Auto-Carving. Determines whether the auto-carving policy is enabled ordisabled. When it is enabled, any unit larger than a specified size (known
