ATA Command Set
XL500S
34
RELEASED 10/21/10 (WD CONFIDENTIAL)
2679-701211-A06
53
Additional Words Valid
Bit 15-8: Free-fall Control Sensitivity
00h = Vendor’s recommended setting
01h-FFh = Sensitivity level. A larger number is a more sensitive
setting.
Bit 7-3: Reserved
Bit 2: 1 = the fields reported in word 88 are valid
0 = the fields reported in word 88 are not valid
Bit 1: 1 = the fields reported in words (64-70) are valid
0 = the fields reported in words (64-70) are not valid
Bit 0: Obsolete
0007h
54-58
Obsolete
0
59
Current Blocking Factor
Bit 15-9: Reserved
Bit 8: If set, Multiple sector setting is valid
Bit 7-0: Current setting for number of logical sectors that shall
be transferred per DRQ data block on READ/WRITE Multiple
commands
01XXh
60-61
Total number of user addressable logical sectors (Dword)
XXXXh
62
Obsolete
0
63
Multi-Word DMA Transfer Mode Supported
Bit 15-11: Reserved
Bit 10: If set, Multiword DMA mode 2 is selected
Bit 9: If set, Multiword DMA mode 1 is selected
Bit 8: If set, Multiword DMA mode 0 is selected
Bits 0-7: Multiword DMA mode 2 and below are supported
XX07h
64
Advanced PIO Modes Supported
Bit 15-8: Reserved
Bits 7-0: PIO Modes supported
0003h
65
Min. Multi-Word DMA Transfer Cycle Time per word (ns)
120
66
Manufacturer Recommended Multi-Word DMA Cycle Time (ns)
120
67
Min. PIO Transfer Cycle Time without flow control (ns)
120
68
Min. PIO Transfer Cycle Time with flow control (ns)
120
69-70
Reserved
0
71-74
Reserved for the IDENTIFY PACKET DEVICE command.
0
75
Queue Depth
Bit 15-5: Reserved
Bit 4-0: Maximum queue depth - 1
001F
76
Serial ATA Capabilities
Bit 15-11: Reserved for Serial ATA
Bit 10: If set, supports Phy event counters
Bit 9: If set, supports receipt of host initiated
powermanagement requests
Bit 8: If set, supports native command queuing (NCQ)
Bit 7-3: Reserved for future SATA signaling speed grades
Bit 2: If set, supports Serial ATA Gen-2 signaling speed (300
MB/s)
Bit 1: If set, supports Serial ATA Gen-1 signaling speed (150
MB/s)
Bit 0: Cleared to 0
0001111100000110b
77
Reserved for Serial ATA
0
78
Serial ATA Features Supported
Bit 15-7: Reserved for Serial ATA
Bit 6: If set, device supports software settings preservation
Bit 5: Reserved for Serial ATA
Bit 4: If set, device supports in-order data delivery
Bit 3: If set, device supports initiating power management.
Bit 2: If set, device supports DMA Setup auto-activation
Bit 1: If set, device supports non-zero buffer offsets
Bit 0: Cleared to 0
0000000001000100b
WORD
FIELD DESCRIPTION
VALUE