
ATA Command Set
EX800M
42
RELEASED 8/13/13
2679-771339-A05
5.4
Set Features (EFh)
The Set Features command enables or disables the features listed in the following table.
FUNCTION
FEATURES
REGISTER
SECTOR COUNT REGISTER
Enable read cache
1
AAh
Don’t care
Disable read cache
1
55h
Don’t care
Enable write cache
1
02h
Don’t care
Disable write cache
1
82h
Don’t care
Set Transfer Mode
03h
Don’t care
Enable use of Serial ATA Feature
10h
02h-DMA Setup FIS Auto-Activate optimization
06h-Software Settings Preservation
Disable use of Serial ATA Feature
90h
02h-DMA Setup FIS Auto-Activate optimization
06h-Software Settings Preservation
1
Changes are only valid while power remains applied to the drive. After power is cycled, the drive reverts to the default
settings.