HP SmartStart-Software - Manual (Page 46)

Toolkit utilities 46
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 42 ), 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 46 ).
• 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).
Sectors
This option specifies the number of sectors that are to comprise each track. Enter 32 to disable MaxBoot
or 63 to enable it.
• For new logical drives, the default setting is 63 if the logical drive is larger than 502 GB. Otherwise,
the default setting is 32.
• For an existing logical drive, the default setting is the existing setting.
Logical drive performance is likely to decrease with MaxBoot enabled.
Size
Enter the capacity that you want the logical drive to have, in megabytes. The default size setting for new
logical drives is MAX. In this case, ACU creates a logical drive of the maximum possible size from the
physical drives that you assigned to the array.