Table 120 Identify Device Information -Continued - Western Digital Ultrastar DC HC310 Specifications

Word Content
97 xxxxH
98 xxxxH
99 xxxxH
100-103 xxxxH
104 xxxxH
105 0000H
106 6003H
107 5A87H
108-111 xxxxH
112-118 0000H
119 40DCh
120 409Ch

Table 120 Identify device information -Continued-

Description
Streaming Access Latency – DMA and PIO
The worst-case access latency of the device for a streaming command is calculated as
follows:
Access Latency = (word 97) * (words(99:98) / 256)
If the Streaming Feature set is not supported by the device, the content of word 97 shall
be zero.
Streaming Performance Granularity
Streaming Performance Granularity
Total Number of User Addressable Logical Sectors for 48-bit commands
Streaming Transfer Time – PIO
The worst-case sustainable transfer time per sector for the device is calculated as
follows:
Streaming Transfer Time = (word 104) * (words(99:98) / 65536)
If the Streaming Feature set is not supported by the device, the content of word 104
shall be zero.
Reserved
Physical sector size / logical sector size
15 Shall be cleared to zero
14 Shall be set to one.
13 0=Device does not have multiple logical sectors per physical sector
12 0=Device logical sector is 256 words
11-4 Reserved
3-0 0=2^0 logical sectors per physical sector
Inter-seek delay for ISO-7779 acoustic testing in microseconds
World wide name
the optional value of the world wide name for the device
Reserved
Supported settings (Continued from word 84:82)
15 Shall be cleared to zero
14 Shall be set to one.
13-8 Reserved
7 1=Extended Power Conditions feature set is supported
6 1=Sense data is supported
5 0=Free-fall Control feature set is not supported
4 1=The segmented feature for download microcode is supported.
3 1=The READ/ WRITE LOG DMA EXT commands are supported.
2 1=Write Uncorrectable is supported.
1 0=Write-Read-Verify feature set is not supported
0 Reserved
Command set/feature enabled/supported. (Continued from word 87:85)
15 Shall be cleared to zero
14 Shall be set to one.
13-8 Reserved
7 1=Extended Power Conditions feature set is enabled
6 0=Sense data is disabled
5 0=Free-fall Control feature set is disabled
4 1=The segmented feature for download microcode is supported.
3 1=The READ/ WRITE LOG DMA EXT commands are supported.
2 1=Write Uncorrectable is supported.
1 0=Write-Read-Verify feature set is not enabled
0 Reserved
Western Digital Hard Disk Drive OEM Specification
147