142
Western Digital Hard Disk Drive OEM Specification
Word
Content
Description
65
0078H
Minimum Multiword DMA Transfer Cycle Time Per Word
15-0 (=78) Cycle time in nanoseconds (120ns, 16.6MB/s)
66
0078H
Manufacturer’s Recommended Multiword DMA Transfer Cycle Time
15-0 (=78) Cycle time in nanoseconds (120ns, 16.6MB/s)
67
0078H
Minimum PIO Transfer Cycle Time Without Flow Control
15-0 (=78) Cycle time in nanoseconds (120ns, 16.6MB/s)
68
0078H
Minimum PIO Transfer Cycle Time With IORDY Flow Control
15- 0 (=78) Cycle time in nanoseconds (120ns, 16.6MB/s)
69
0D08H
Additional Supported
or
11 (=1) READ BUFFER DMA command is supported
0D18H
10 (=1) WRITE BUFFER DMA command is supported
8 (=1)
DOWNLOAD MICROCODE DMA is supported
4 (=x) Encryption All User Data
3 (=1)
Extended Number of User Addressable Sectors is supported
70-74
0000H
Reserved
75
001FH
Queue depth
15-5 (=0) Reserved
4-0 (=1F) Maximum queued depth
– 1
76
970xH
SATA capabilities
15 (=1) READ LOG DMA EXT command is supported
14-13 (=0) Reserved
12 (=1) High Priority command (Please see 6.5 First-party DMA commands)
11 (=0) Unload while NCQ commands are outstanding is supported
10 (=1) Phy event counters
9 (=1) Receipt of host-initiated interface power management requests
8 (=1) Native Command Queuing supported
7-4 (=0) Reserved
3 (=x) SATA Gen-3 speed (6.0Gbps) supported
2 (=x) SATA Gen-2 speed (3.0Gbps) supported
1 (=1) SATA Gen-1 speed (1.5Gbps) supported
0 (=0) Reserved
77
007xH
15-8 (=0) Reserved
7 (=0) DevSleep_to_ReducedPwrState
6 (=1) Supports RECEIVE FPDMA QUEUED and SEND FPDMA QUEUED
5 (=1) Supports NCQ NON-DATA Command
4 (=1) Supports NCQ Streaming
3-1 (=011) Current negotiated SATA speed Gen-3 speed of 6.0Gbps
(=010) Current negotiated SATA speed Gen-2 speed of 3.0Gbps
(=001) Current negotiated SATA speed Gen-1 speed of 1.5Gbps
0(=0) Reserved
Table 115 Identify device information -Continued-
