Deskstar 7K160 Hard Disk Drive Specification
161
Table 89: Identify device information
Word Content Description
94 xxxxH Current Automatic Acoustic Management value
15-8 Vendor's Recommended Acoustic Management level
7-0 Current Automatic Acoustic Management value
95 xxxxH
Stream Minimum Request Size
Number of sectors that provides optimum performance in streaming environment. This number
shall be a power of two, with a minimum of eight sectors (4096 bytes). The starting LBA value
for each streaming command should be evenly divisible by this request size.
96 xxxxH
Streaming Transfer Time - DMA
The worst-case sustainable transfer time per sector for the device is calculated as follows:
Streaming Transfer Time = (word 96) * (words(99:98) / 65536)
If the Streaming Feature set is not supported by the device, the content of word 96 shall be
zero.
97 xxxxH
Streaming Access Latency - DMA and PIO
The worst-case access latency of the devoce 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.
98-99 xxxxH
Streaming Performance Granularity
These words define the fixed unit of time that is used in Identify Device words (97:96) and
(104),and Set Features subcommand 43h, and in the Streaming Performance Parameters log,
which is accessed by use of the Read Log Ext command, and in the Command Completion
Time Limit that is passed in streaming commands. The unit of time for this parameter shall be
in microseconds, e.g. ad value of 10000 indicates 10 ms.
100-103 xxxxH Maximum user LBA address for 48-bit Address feature set
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.
105-106 0000H Reserved
107 5A87H Inter-seek delay for ISO-7779 acoustic testing in microseconds
108-111 xxxxH
World wide name
the optional value of the world wide name for the device
112-118 0000H Reserved
119 4010h Supported settings (Continued from word 84:82)
15 Shall be cleared to zero
14 Shall be set to one.
13-5 Reserved
4 1=The segmented feature for download microcode is supported.
3 0=Read and Write DMA Ext GPL optional commands are not supported.
2 0=Write Uncorrectable is not supported.
1 0=Write-Read-Verify feature set is not supported
0 Reserved
120 4010h Command set/feature enabled/supported. (Continued from word 87:85)
15 Shall be cleared to zero
14 Shall be set to one.
13-5 Reserved
4 1=The segmented feature for download microcode is supported.
3 0=Read and Write DMA Ext GPL optional commands are not supported.
2 0=Write Uncorrectable is not supported.
1 0=Write-Read-Verify feature set is not enabled
0 Reserved
121-126 0000H Reserved
127 0000H Removable Media Status Notification feature set
0000H=Not supported
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