PR1000M
ATA C
OMMAND
S
ET
RELEASED 5/8/17 (WD CONFIDENTIAL)
39
4.4
Set Features (EFh)
The Set Features command enables or disables the features listed in the following
table.
Note:
Changes are only valid while power remains applied to the drive. After power is
cycled, the drive reverts to the default settings.
FUNCTION
FEATURES
REGISTER
SECTOR COUNT REGISTER
Enable read look-ahead
1
AA
H
D
ON
’
T CARE
Disable read look-ahead
1
55
H
D
ON
’
T CARE
Enable write cache
1
02
H
D
ON
’
T CARE
Disable write cache
1
82
H
D
ON
’
T CARE
Set Transfer Mode
03
H
D
ON
’
T CARE
Enable use of Serial ATA Feature
10
H
02h-DMA Setup FIS Auto-Activate optimization
06h-Software Settings Preservation
Disable use of Serial ATA Feature
90
H
02h-DMA Setup FIS Auto-Activate optimization
06h-Software Settings Preservation
Summary of Contents for Purple PR1000M
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