User manual

Promise Array Manager
72
There are two options you can specify for an Array:
Automatic Sequential / Random Access Detection
This option is only available for SuperTrak SX6000. When enabled
(checked) the read-ahead cache determines if a sequential or random
input/output event is occurring and optimizes itself accordingly. Optimizing
results in better array performance.
Enable Write Back Cache
Write back cache accepts write data from the CPU and holds it briefly in
cache memory. When the computer has idle cycles, the data is written to the
hard drive. This arrangement speeds up disk performance because you can
write data to a cache much faster than to a hard disk.
While the data is in the cache, there is a risk of loss if a power failure occurs.
Using an uninterruptible power supply virtually eliminates that risk.