Cache options and settings can be unique for each logical drive.

Cache Write Policy

1. Write Through - I/O completion is signaled only after the data is written to the hard disk.
2. Write Back - I/O completion is signaled when data is transferred to cache.

1. Direct I/O - When possible, no cache is involved for both reads and writes. The data transfers will be directly from host to disk and from disk to host.
2. Cached I/O - All reads will first look at cache. If a cache hit occurs, the data will be read from cache; if not, the data will be read from disk and the read data buffered into cache. All writes to drive are also written to cache.

1. No Read Ahead - Provides no read ahead for the logical drive having this option turned on.
2. Read Ahead - Additional consecutive stripes/lines are read and buffered into cache.
3. Adaptive - The read-ahead will be automatically turned on and off depending upon whether the disk is accessed for sequential reads or random reads

This applies to:

Intel® RAID Controller SRCS16 Intel® RAID Controller SRCU42X