Viewing and Seting Controller Policieswww.3ware.com 117Viewing and Seting Controller PoliciesThe following controller-wide policies can be adjusted as appropriate for yourequipment.• Auto-Rebuild. Determines whether the Auto-Rebuild policy is enabled ordisabled. When disabled, degraded units can only be rebuilt withdesignated spares. When enabled, the controller firmware will attempt torebuild a degraded unit if there is no spare, using either an available driveor a failed drive. Applies only to 9550SX and 9590SE controllers.• Auto-Carving. Determines whether the auto-carving policy is enabled ordisabled. When it is enabled, any unit larger than a specified size (knownas the carve size) is created as multiple volumes that can be addressed bythe operating system as separate volumes. The default carve size is 2 TB.This auto-carving feature is sometimes referred to as multi-LUN, whereeach volume that is created is referred to as a “LUN.”• Carve Size. (Referred to as Carving Factor in 3BM) Sets a size fordividing up units into volumes when Auto-Carving is enabled. Thissetting can be between 1024 and 2048 GB.• Staggered spin-up. Spin-up 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 spin-up and Delay between spin-up settings. These policies canonly be set in 3BM and CLI.• Number of drives per spin-up. Number of drives that will spin up atthe same time when the controller is powered up, if staggered spin-upis enabled. From 1 to x, depending on the number of ports on thecontroller.• Delay between spin-up. The delay time (in seconds) between drivegroups that spin up at one time on this particular controller, ifstaggered spin-up is enabled.• 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.• 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 and 9590SEcontrollers; the feature is integrated into the StorSave policy.)
