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

Table 1. Read, Write, and Cache Policy supported by the PERC S130, PERC S140 and PERC S150 controllers
Read, Write, and Cache Policy PERC S130 PERC S140 PERC S150
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 No Yes Yes
Cache I/O No No No
Direct I/O No No No