AMCC 3ware 9000 Series, User Manual

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Configuring Your Controller
76 3ware 9000 Series Serial ATA RAID Controller User Guide
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.
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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