Datasheet

B-21
DOS Utilities
In addition, there are other array properties that enable you to
control the various array settings during creation. See Array
Definition Block Properties on page B-25 for the complete list of array
properties.
Note: You can configure each individual channel on the
controller using this property, which specifies the device ID
number of the controller on the channel.
Initializing Drives
By default, when you use playback mode to create arrays, the ACU
initializes only those drives specified by the
Drives property
keyword in the script file. It performs this initialization step before
creating any new arrays. For example, consider a script file that
defines the following new arrays:
■ RAID 1 with drives=0:0:0, 0:1:0
■ RAID 5 with drives=0:1:0, 0:2:0, 0:3:0
As a result of executing this script file, the ACU initializes all drives
comprising the two arrays before creating any arrays. Any other
drives connected to the controller are not affected.
Initializing a drive automatically deletes any existing arrays with
that drive as their member. For example, if you specify drive 0:0:0
in an array’s
Drives property and that drive happens to be part of
a RAID 0 (stripe) array, the ACU deletes the stripe array when it
initializes the drive. Note that existing arrays with drive members
that are not specified in any
Drives property within the script are
not affected.
In some cases, you might want the ACU to initialize all drives
connected to the controller, even those that are not specified in a
script’s
Drives property. This ensures that all drives are initialized
and any existing arrays are deleted before any new arrays are
created. You can specify
InitializeAll=Yes within any array
definition to instruct the ACU to perform this task. Unlike most
array properties, the
InitializeAll=Yes property is a global ACU
setting and does not apply only to the array whose definition it
appears in. Thus, you need only specify
InitializeAll=Yes once
within any array definition to produce the desired action.