AMCC 9500S, 9550SX Cx set exportjbod=onoff, Cx set ondegrade=cacheofffollow, Cx set spinup=nn

Controller Object Commands

/cx set exportjbod=onoff

This command allows you to set the JBOD Export Policy to on or off. By default, exportjbod is off.

If the JBOD export policy is off, CLI will not be able to create JBODs. During reboot, firmware will not export JBOD units to the operating system.

The JBOD Export Policy is only supported on 9000-series controllers. Previous models did not have such a policy enforcement feature.

A JBOD is an unconfigured disk attached to your 3ware RAID controller. AMCC recommends that you use Single Disk as a replacement for JBOD, to take advantage of features such as RAID level migration.

/cx set ondegrade=cacheofffollow

This command is only for 9500S controllers.

This command allows you to set a controller-based write cache policy. If the policy is set to cacheoff and a unit degrades, the firmware will disable the write-cache on the degraded unit, regardless of what the unit-based write cache policy is. If the policy is set to follow and a unit degrades, firmware will follow whatever cache policy has been set for that unit. (For details about the unit-based policy, see “/cx/ux set cache=onoff [quiet]” on page 68.)

/cx set spinup=nn

This command is only for 9000 series controllers.

This command allows you to set a controller-based Disk Spinup Policy that specifies how many drives can spin up at one time. The value must be a positive integer between 1 and the number of disks/ports supported on the controller (4, 8, or 12). The default is 1.

This policy is used to stagger spinups of disks at boot time in order to spread the power consumption on the power supply. For example, given a spinup policy of 2, the controller will spin up two disks at a time, pause, and then spin up another 2 disks. The amount of time to pause can be specified with the Spinup Stagger Time Policy (/cx set stagger).

Not all drives support staggered spinup. If you enable staggered spinup and have drives that do not support it, the setting will be ignored.

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