Read, Write, And Cache Policy Supported By The PERC 5/E, PERC 6, And CERC 6/I Controllers

Table 45. Read, Write, and Cache Policy Supported by the PERC 5/E, PERC 6/, and CERC 6/I Controllers
Read, Write, and Cache Policy PERC 5/E PERC 5/I PERC 6/E PERC 6/I PERC 6/I Modular CERC 6/I
Cache settings YesYesYesYesYesYes
Read Policy YesYesYesYesYesYes
Read Ahead (Enabled) YesYesYesYesYesYes
Adaptive Read Ahead YesYesYesYesYesYes
No Read Ahead (Disabled) YesYesYesYesYesYes
Write Policy YesYesYesYesYesYes
Write Back (Enabled) YesYesYesYesYesYes
Write Through (Disabled) YesYesYesYesYesYes
Force Write Back (Enabled Always) YesYesYesYesYesYes
Write Cache Enabled Protected NoNoNoNoNoNo
Cache Policy NoNoNoNoNoNo
Disk Cache Policy YesYesYesYesYesNo
Cache I/O NoNoNoNoNoNo
Direct I/O NoNoNoNoNoNo