HP Linux Server Management Software - Manual (Page 46)

Toolkit utilities 46
Read:write
ratio
RA4x00 with
16MB cache
RA4x00 with
48MB cache
All other controllers
with battery-backed
write cache
All other controllers
without battery-backed
write cache
100:0 + + + +
90:10
+ + – –
80:20 + + – –
75:25 – – + –
70:30 + + – –
60:40
+ + – –
50:50 + + + –
40:60 – + – –
30:70 – + – –
25:75 – + + –
0:50* + – – –
0:75* – + – –
0:100 – – + –
* The cache ratio percentages do not total 100 in these cases because the additional 16-MB or 48-MB cache modules
are not used. Only the battery-backed write cache is used.
RebuildPriority, ExpandPriority
This option has three possible values: Low, Medium, and High.
SSPState
There are two settings for this option: Enable and Disable. If you do not specify a value for the SSP State, the
existing setting remains unchanged.
NOTE: The SSPState option is valid only for controllers that enable SSP on a controller basis,
such as the MSA1000 or the Smart Array Cluster Storage controllers. RA4x00 controllers support
SSP that is enabled on a logical drive basis, and use the LogicalDriveSSPState option
("
LogicalDriveSSPState " on page 49 ) instead.
If you enable SSP, you must also specify an adapter for one or more logical drives by using the
SSPAdaptersWithAccess option ("
SSPAdaptersWithAccess " on page 50 ). Otherwise, SSP is automatically
disabled.
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: