HP Linux Server Management Software - Manual (Page 49)

Toolkit utilities 49
LogicalDrive
The value that you enter for this option specifies the ID number of the logical drive that is to be created or
modified. The first logical drive on an array must have an ID of 1 (not 0), and logical drive numbering must
be contiguous.
• In Configure action mode, ACU accepts only the ID number of the next possible logical drive.
• In Reconfigure action mode, ACU also accepts the ID number of any existing logical drive.
LogicalDriveSSPState
This option is valid only for controllers that enable SSP on a logical drive basis. Other controllers that support
SSP use the SSPState option (" SSPState " on page 46 ).
The following defaults apply:
• For new logical drives, the default value is Disabled.
• For existing logical drives, the default value is the current logical drive setting.
ParityGroups
When you create a RAID 50 or RAID 60 configuration, you must also set the number of parity groups.
You can use any integer value greater than 1 for this setting, with the restriction that the total number of
physical drives in the array must be exactly divisible by the number of parity groups.
The maximum number of parity groups possible for a particular number of physical drives is the total number
of drives divided by the minimum number of drives necessary for that RAID level (three for RAID 50, four for
RAID 60).
PreferredPath
If you select the Manual setting for PreferredPathMode (on page 45 ), use the PreferredPath
command to specify the path for I/O to the logical drive on a redundant controller in active/active mode.
The default setting for this option is 1. With this setting, the controller in chassis slot 1 is the preferred
controller for I/O to the logical drive. If you select 2, the controller in chassis slot 2 becomes the preferred
controller for the logical drive.
To determine the chassis slot numbers, use the show command on a controller that supports redundant
controllers.
RAID
The value that you enter for this option specifies the RAID level of the logical drive.
• When the Action mode is Configure, and the Method mode is Auto, ACU automatically selects the
highest RAID level that the controller and drive configuration can support except RAID 50 or RAID 60.
To specify RAID 50 or 60 for a controller that supports either of these RAID levels, use the Custom
setting. In this case, you must also specify the number of parity groups (" ParityGroups " on page 49 ).
• When the Action mode is Reconfigure, the default value is the existing RAID level for that logical drive.
If you specify a different RAID setting, then ACU either ignores the new setting (when Method mode is
Auto), or attempts to migrate the logical drive to the specified RAID level (when Method mode is
Custom).