Hardware User Guide

4 Intel® Integrated RAID Module RMT3PB080 and RMT3CB080 Hardware User’s Guide
— Write-back: Faster because it does not wait for the disk but data will be lost if
power is lost.
— Write-through: Usually slower but ensures data is on the disk.
— Read Ahead: Predicts next read will be sequential and buffers this data into
the cache.
— Non Read Ahead: Always reads from the drive after determining exact location
of each read.
— Adaptive Read Ahead: Reads ahead and caches data only if doing
sequential reads.
— I/O setting. Determines whether read operations check the cache before reading
from disks.
✧ Cache I/O: Checks cache first, only reads disk if data is not in the cache.
✧ Direct I/O: Reads data directly from disk. (not cache)
• Redundancy through:
— Configuration stored in non-volatile RAM and on the drives (COD).
— Hot-swap support.
— Optional battery backup or maintenance free backup for cache memory.