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Word
Content
Description
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.
98-99
xxxxH
Streaming Performance Granularity
100-103 xxxxH
Total Number of User Addressable Logical Sectors for 48-bit commands
104
xxxxH
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.
105
0000H
Reserved
106
x00xH
Physical sector size / logical sector size
15 (=0)
Shall be cleared to zero
14 (=1)
Shall be set to one.
13 (=x)
Device has multiple logical sectors per physical sector
If logical sector size is 512 bytes, the content of this bit is 1b.
If logical sector size is 4096 bytes, the content of this bit is 0b.
12 (=x)
Device logical sector is longer than 256 words
If logical sector size is 512 bytes, the content of this bit is 0b.
If logical sector size is 4096 bytes, the content of this bit is 1b.
11-4 (=00H) Reserved
3-0 (=xH)
2^0 logical sectors per physical sector
If logical sector size is 512 bytes, the content of these bits are 0011b.
If logical sector size is 4096 bytes, the content of these bits are 0000b.
107
5A87H
Inter-seek delay for ISO-7779 acoustic testing in microseconds
108-111 xxxxH
Worldwide name the optional value of the worldwide name for the device
112-116 0000H
Reserved
117-118 xxxxH
Words per logical sector
This word is set number of words per logical sector when sector size is longer than 256
words.
If logical sector size is 512 bytes, the content of these bits are 0000H.
If logical sector size is 4096 bytes, the content of these bits are 0800H.
119
40DCh
Supported settings (Continued from word 84:82)
15 (=0)
Shall be cleared to zero
14 (=1)
Shall be set to one.
13-10(=0)
Reserved
9 (=0)
DSN feature set is not supported
8 (=0)
Accessible Max Address Configuration feature set is not supported
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 EXT is supported and enabled.
1 (=0)
Write-Read-Verify feature set is not supported
0 (=0)
Reserved
120
40DCh
Command set/feature enabled/supported. (Continued from word 87:85)
15 (=0)
Shall be cleared to zero
14 (=1)
Shall be set to one.
13-10(=0)
Reserved
9 (=0)
DSN feature set is not enabled
8 (=0)
Reserved
7 (=1)
Extended Power Conditions feature set is enabled
6 (=1)
Sense data is enabled
5 (=0)
Free-fall Control feature set is disabled
170
Hard Disk Drive Specification