Read, Write, Cache And Disk Cache Policy Supported By PERC Hardware Controllers
| Read, Write, and Cache Policy | PERC H840 Adapter | PERC FD33xD/FD33xS | PERC H730P MX | PERC H745P MX | PERC H745P Front/Adapter | PERC H345 Front/Adapter | PERC H755 Front/Adapter | PERC H755N Front |
|---|---|---|---|---|---|---|---|---|
| Cache settings | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Read Policy | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Read Ahead (Enabled) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Adaptive Read Ahead | No | No | No | No | No | No | No | No |
| No Read Ahead (Disabled) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Write Policy | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Write Back (Enabled) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Write Through (Disabled) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Force Write Back (Enabled Always) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Write Cache Enabled Protected | No | No | No | No | No | No | No | No |
| Cache Policy | No | No | No | No | No | No | No | No |
| Disk Cache Policy | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Cache I/O | No | No | No | No | No | No | No | No |
| Direct I/O | No | No | No | No | No | No | No | No |
| Read, Write, and Cache Policy | PERC H840 Adapter | PERC FD33xD/FD33xS | PERC H730P MX | PERC H745P MX | PERC H745P Front/Adapter | PERC H345 Front/Adapter | PERC 755 Front/Adapter | PERC H755N Front |
|---|---|---|---|---|---|---|---|---|
| Cache settings | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Read Policy | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Read Ahead (Enabled) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Adaptive Read Ahead | No | No | No | No | No | No | No | No |
| No Read Ahead (Disabled) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Write Policy | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Write Back (Enabled) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Write Through (Disabled) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Force Write Back (Enabled Always) | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Write Cache Enabled Protected | No | No | No | No | No | No | No | No |
| Cache Policy | No | No | No | No | No | No | No | No |
| Disk Cache Policy | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Cache I/O | No | No | No | No | No | No | No | No |
| Direct I/O | No | No | No | No | No | No | No | No |