HP Array Configuration Utility 79
LicenseKey, DeleteLicenseKey
These options enable you to enter a 25-character license key to activate or uninstall some controller features.
Hyphens can be entered, but are not required.
NoBatteryWriteCache
With this option, the controller can enable write cache when no battery is present or when the battery fails.
Values are
Enable
or
Disable
. The default is
Disable
.
Some controllers do not support this option.
PreferredPathMode
The setting that you select for this option determines how the preferred I/O path to a particular logical drive
is set for a redundant array controller that is in an active/active configuration.
Not all controllers support this feature, and controllers in an active/standby configuration disregard this
option.
•
Auto
is the default setting for new configurations. In this case, the storage system automatically selects
the I/O path from the redundant controller to the logical drive and dynamically load balances all paths.
•
Manual
enables you to assign the logical drive to a specific redundant controller. If you select this
setting, use the
PreferredPath
(on page
84
) command to specify the path.
If you are reconfiguring a controller and do not specify a setting for this option, the existing setting remains
unchanged.
RaidArrayId
This option specifies the RaidArrayId for controllers that support this feature, such as fibre and shared storage
controllers. The RaidArrayId is a user-defined string that identifies controllers.
"XXXXXXXXXXXXXXXXXXXX"
The value can be a string of varying length that consists of any of the following characters:
a-z A-Z 0-9 ! @ # * ( ) , - _ + : . / [space]
This string cannot end in a space character.
This string has a maximum length that varies depending on the type of controller. For RA4x00 controllers, the
maximum length is 24 characters. For other controllers, the maximum length is 20 characters.
The quotes enclosing the string are optional. The quotes allow you to use leading space characters in the
RaidArrayId
.
ReadCache, WriteCache
Enter a number between 0 and 100 to specify the percentage of cache that is to be allocated to drive reads
or writes. The default value for both options is 50, depending on the controller and the battery status.
The allowable cache ratios depend on the controller model and whether it has battery-backed write cache,
as described in the following table.
A "+" indicates that the specified cache ratio is allowed for that type of controller, while a "–" indicates that
the ratio is not allowed.
