3Ware 9500S-4LP User Guide - Page 82

Configuring Your Controller Setting Policies for a Controller through 3BM 3BM allows you to set policies for all units on the controller. These policies can only be set or changed in 3BM, however you can check the settings for them in 3DM. „ Export JBOD (unconfigured) disks. This setting indicates whether JBOD disks should be exported to the operating system. JBOD configuration is strongly discouraged for newly added disks on the 9000 series controller, in favor of Single Disk, so by default, this setting is disabled. If you have a JBOD configuration from a 7000/8000 controller that you want to use on the 9000 controller, you should enable this setting. „ Staggered spinup. Spinup allows drives to be powered-up into the Standby power management state to minimize in-rush current at power-up and to allow the controller to sequence the spin-up of drives. This setting determines whether all of the drives will spin up at the same time or in a staggered fashion. If staggered spinup is enabled, then compatible drives will be sent a spin up command as defined by the Number of drives per spinup and Delay between spinup settings. If staggered spinup is disabled, then the spin up command is sent to all of the drives at boot time, resulting in all of the drives spinning up simultaneously. „ Number of drives per spinup. Number of drives that will spin up at the same time when the controller is powered up, if staggered spinup is enabled. „ Delay between spinup. The delay time (in seconds) between drive groups that spin up at one time on this particular controller, if staggered spinup is enabled. „ Disable write cache degraded array. Indicates whether write cache will be automatically disabled on a unit if it becomes degraded. Selecting Yes will cause the unit write cache and the disk drive write cache to be disabled if the unit degrades. This setting has no effect on non-redundant arrays. Write cache will be automatically re-enabled when the unit returns to normal. Selecting No will cause the unit and disk drive write cache to remain enabled (if it is enabled), in the event that the unit degrades. „ Staggered method. Indicates whether the type of staggered spinup is ATA-6 or SATA OOB (Out Of Band). By default, when Staggered Spinup is enabled, the ATA-6 scheme is used. If your drives support the SATA OOB method, select that method here. There is no electronic method for the controller to know if a drive supports this method, so it must be set 76 3ware 9000 Series Serial ATA RAID Controller User Guide