Read Write Cache and Disk Cache Policy supported by the PERC software RAID controllers

Table 1. Read, Write, and Cache Policy supported on PERC S140, S150, and S160 controllers
Read, Write, and Cache Policy PERC S140 PERC S150 PERC S160
Cache settings Yes Yes Yes
Read Policy Yes Yes Yes
Read Ahead (Enabled) Yes Yes Yes
No Read Ahead (Disabled) Yes Yes Yes
Write Policy Yes Yes Yes
Write Back (Enabled) Yes Yes Yes
Write Through (Disabled) Yes Yes Yes
Force Write Back (Enabled Always) No No No
Write Cache Enabled Protected No No No
Disk Cache Policy Yes Yes Yes
Cache I/O No No No
Direct I/O No No No