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SMART-2DH Array Controller Reference Guide
Writer: Pamela King Project: SMART-2DH Array Controller Reference Guide Comments: 295469-002
File Name: F-CH05.DOC Last Saved On: 2/27/98 11:38 AM
COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED
Controller Settings Screen
In this screen (Figure 5-18), select the operating system and set the Rebuild
Priority, Expand Priority, and Accelerator Ratio. Rebuild and expand priority
selections have no impact on an “idle” system but will impact performance on a
“busy” system.
The Rebuild Priority affects the amount of time the controller spends
rebuilding data after a failed drive has been replaced. Select High if rebuilding
data should take precedence over handling requests from the operating system.
Select Low if the controller should rebuild data only when it is idle.
The Expand Priority affects when the controller moves data after you have
chosen to expand the capacity of an array. Select High if expanding the array
capacity should take precedence over handling requests from the operating
system. Select Low if the controller should expand the array capacity only
when it is idle.
The Accelerator Ratio determines the amount of memory allocated to the read
and write caches. Some applications may perform better with a larger write
cache and others may perform better with a larger read cache.
NOTE
: This feature works with both 4-MB and 16-MB Array Accelerator
boards.
Use the Controller Settings Screen to select the Operating System, set the
Rebuild Priority, Expand Priority, and Accelerator Ratio.
