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Setting Unit Policies
www.lsi.com/channel/products 111
Figure 54. Unit Write Cache State in 3BM
The current setting—Enabled or Disabled—is shown. (The initial default
setting is for write cache to be enabled.)
5 Press
Enter to display the choices, use the arrow keys to select the
setting you want, and press
Enter again to choose it.
6Tab to the
OK button and press Enter to select it.
You return to the main 3BM screen.
7 When you are finished making changes, press
F8 to save them and exit
3BM.
Working with Read Cache Settings
The Read Cache unit policy lets you enable either Basic Read Caching or
Intelligent Read Caching. You can also disable the Read Cache unit policy, if
preferred.
By default, Read Cache is set to
Intelligent. You can change it to Basic or to
Disabled, as appropriate.
About the Read Cache Basic and Intelligent Modes
Basic Mode is used to store read cache data locally on the controller that has
recently been written to media and is likely to be frequently accessed. This
improves read access times for applications such as a database that can take
advantage of storage caching. The read cache may be disabled without
reducing performance for applications that are write intensive, or that rarely
read back data recently written.
Intelligent Mode enables the Intelligent Read Prefetch (IRP) feature.
The Intelligent Read Prefetch feature includes a typical read-ahead caching
method which is used to proactively retrieve data from media and store it
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