Set Features (Efh) - Western Digital Re EX800M Technical Reference Manual

ATA Command Set
5.4

Set Features (EFh)

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