Promise Technology 66 Pro user manual Turning On Read Cache, Turning Off Caching

SuperTrak66™ User's Manual Chapter 5

Turning On Read Cache

Depending on the application or server operation in which the SuperTrak66 is used, admin/users may elect to turn on the read cache feature of the SuperTrak66 controller for performance purposes or disable caching entirely. Presence or absence of read cache may have a dramatic effect. Consult Chapter 6 RAID Management for more details.

1)To turn on read cache from SuperCheck, double-click the Array icon in Tree View.

2)In the Information View, left-click the arrow next to the Read Cache selection box and choose "On" (see p. 98).

Turning Off Caching

1)To turn off all caching from SuperCheck, double-click the Array icon in Tree View.

2)In the Information View, left-click the arrow next to the Read Cache selection box and choose "Cache Off". This will disable all caching functions from SuperTrak66 (see p. 98).

Turning On/Off Write Back Cache

Write-back cache affects system perf ormance depending on server and application type. However, write-back cache data will be lost in the event of a system power outage or other event where the data has not yet been saved to disk. Turning off write-back caching will force SuperTrak66 to immediately save all writes to the drive.

1)To turn on/off write back caching from SuperCheck, double-click the Array icon in Tree View.

2)In the Information View, make sure Read Cache is turned "On".

3)Left-click the arrow next to the Write Cache selection box and choose "Write Back". This will enable "write" and "write back" caching functions from SuperTrak66 (see p. 98).

- 96 -