Read, Write, Cache And Disk Cache Policy Supported By PERC Hardware Controllers

Table 1. Read, Write, and Cache Policy Supported by PERC Hardware Controllers
Read, Write, and Cache Policy PERC H745P MX PERC H745 Frnt / Adapter PERC H345 Frnt / Adapter PERC H755 MX PERC H755N PERC H755 Frnt/Adapter PERC H840 Adapter
Cache settings Yes Yes Yes Yes Yes Yes Yes
Read Policy Yes Yes Yes Yes Yes Yes Yes
Read Ahead (Enabled) Yes Yes Yes Yes Yes Yes Yes
Adaptive Read Ahead No No No No No No No
No Read Ahead (Disabled) Yes Yes Yes Yes Yes Yes Yes
Write Policy Yes Yes Yes Yes Yes Yes Yes
Write Back (Enabled) Yes Yes Yes Yes Yes Yes Yes
Write Through (Disabled) Yes Yes Yes Yes Yes Yes Yes
Force Write Back (Enabled Always) Yes Yes Yes Yes Yes Yes Yes
Write Cache Enabled Protected No No No No No No No
Cache Policy No No No No No No No
Disk Cache Policy Yes Yes Yes Yes Yes Yes Yes
Cache I/O No No No No No No No
Direct I/O No No No No No No No