Read, Write, And Cache Policy Supported By PERC 6 Controllers
| Read, Write, and Cache Policy | PERC 6/E | PERC 6/I | PERC 6/I Modular |
| 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) | Yes | Yes | Yes |
| Write Cache Enabled Protected | No | No | No |
| Cache Policy | No | No | No |
| Disk Cache Policy | Yes | Yes | Yes |
| Cache I/O | No | No | No |
| Direct I/O | No | No | No |

