Western Digital Blue WD20SPZX Technical Reference Manual page 48

WORD FIELD DESCRIPTION
Commands and feature sets sup-
ported or enabled
Bit 15: Shall be cleared to zero
Bit 14: Shall be set to 1
Bit 13: If set, Idle Immediate with
Unload Feature supported
Bit 12-11 Obsolete
Bit 10-9: Obsolete
Bit 8: If set, 64-bit World wide name
supported
Bit 7: Obsolete
87
Bit 6: If set, Write DMA FUA EXT and
Write Multiple FUA EXT commands
supported
Bit 5: If set, GPL Feature Set sup-
ported
Bit 4: Obsolete
Bit 3: Obsolete
Bit 2: If set, Media serial number is
valid
Bit 1: If set, SMART Self-Test sup-
ported
Bit 0: If set, SMART Error Logging
supported
Ultra DMA modes
Bit 15:Reserved
Bit 14:If set, Ultra DMA Mode 6 is
selected
Bit 13:If set, Ultra DMA Mode 5 is
selected
Bit 12:If set, Ultra DMA Mode 4 is
selected
Bit 11:If set, Ultra DMA Mode 3 is
selected
Bit 10:If set, Ultra DMA Mode 2 is
selected
Bit 9: If set, Ultra DMA Mode 1 is
selected
Bit 8: If set, Ultra DMA Mode 0 is
88
selected
Bit 7: Reserved
Bit 6: Ultra DMA mode 6 and below
are supported
Bit 5: Ultra DMA mode 5 and below
are supported
Bit 4: Ultra DMA mode 4 and below
are supported
Bit 3: Ultra DMA mode 3 and below
are supported
Bit 2: Ultra DMA mode 2 and below
are supported
Bit 1: Ultra DMA mode 1 and below
are supported
Bit 0: Ultra DMA mode 0 supported
WESTERN DIGITAL CONFIDENTIAL
ATA Command Set
F=fixed
V=variable
X= not defined
- 48 -
Drive Program
Power-on Default Value
F
F
F
X
X
F
X
6123h
F
F
X
X
V
F
F
V
V
V
V
V
V
V
V
007Fh
F
F
F
F
F
F
F