Set Features (Efh) - Western Digital WD15NPVX Technical Reference Manual

WD Green MB500M-6Gb
4.4

Set Features (EFh)

The Set Features command enables or disables the features listed in the following table
FUNCTION
Enable read look-ahead
Disable read look-ahead
Enable write cache
Disable write cache
Set Transfer Mode
Enable use of Serial ATA Feature
Disable use of Serial ATA Feature
Enable the PUIS feature set
Disablethe PUIS feature set
PUIS feature set device spinup
Enable/disable reverting to defaults
1
Changes are only valid while power remains applied to the drive. After power is cycled, the drive reverts to the default
settings.
2679-771422-A00
FEATURES
REGISTER
1
1
1
1
1
1
1
1
RELEASED 5/2/13 (WD CONFIDENTIAL)
SECTOR COUNT REGISTER
AAh
55h
02h
82h
03h
10h 02h-DMA Setup FIS Auto-Activate optimization
03h-Device-initiated interface power state transitions
06h-Software Settings Preservation
90h 02h-DMA Setup FIS Auto-Activate optimization
03h-Device-initiated interface power state transitions
06h-Software Settings Preservation
06h
86h
07h
66h
AT Command Set
Don't care
Don't care
Don't care
Don't care
Don't care
Don't care
Don't care
Don't care
Don't care
35