Software Instruction Manual

Toolkit utilities 48
SurfaceScanDelay
Enter a number between 1 and 30 to specify the duration of the surface scan delay in seconds.
Video performance options
To optimize the controller performance for video, set values for the following options as indicated:
DPOEnable = No
ElevatorSortEnable = Yes
IRPEnable = No
In addition:
• Set the MNPDelay to any integer value from 1 to 60 (units are minutes). If you want to disable this
option, set a value of zero instead.
• Set the QueueDepth to any integer value from 2 to 32, or to Auto.
Array category
The Array category has the following options:
• Array (on page 48)
• Drive (on page 48)
• DriveType (on page 49)
• OnlineSpare (on page 49)
Array
Enter a letter or pair of letters to identify the array that is to be created or reconfigured, and observe these
additional limitations:
• In Configure mode, ACU creates a new array. The value that you specify for the array option must
be the next available letter or pair of letters in the sequence, according to the number of existing
arrays on the controller. AA follows Z, and BA follows AZ.
• In Reconfigure mode, ACU can either create a new array or reconfigure an existing array. In this
case, the value that you specify can identify an existing array, or it can correspond to the next
available array letter or pair of letters in the existing configuration.
Drive
You can use this option to add a drive to an existing array (to expand an array) or to build a new array.
If you are expanding an array, each drive that you add must have a capacity no less than that of the
smallest drive already in the array. The added drives and the existing drives in the array must all be the
same type (for example, SAS or SATA).
If the value of the ClearConfigurationWithDataLoss (on page 46) option is Yes, you can use
the Drive option to remove drives from an array. However, the
ClearConfigurationWithDataLoss option is now deprecated.
If you use Auto method mode, ACU configures all the available drives on the controller into one array. If
the drives are of different capacities, ACU determines the capacity of the smallest drive and uses the same
amount of space on all other available drives.