Hitachi HDS721050CLA362 - Table 91 Identify Device Information -Continued

HITACHI Deskstar & CinemaStar 7K1000.B & Deskstar E7K1000 Hard Disk Drive specification
131
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
4014h
Supported settings (Continued from word 84:82)
15
Shall be cleared to zero
14
Shall be set to one.
13-6
Reserved
5
0=Free-fall Control feature set is not supported
4
1=The segmented feature for download microcode is supported.
3
0=Read and Write DMA Ext GPL optional commands are not supported.
2
1=Write Uncorrectable is supported.
1
0=Write-Read-Verify feature set is not supported
0
Reserved
120
4014h
Command set/feature enabled/supported. (Continued from word 87:85)
15
Shall be cleared to zero
14
Shall be set to one.
13-6
Reserved
5
0=Free-fall Control feature set is disabled
4
1=The segmented feature for download microcode is supported.
3
0=Read and Write DMA Ext GPL optional commands are not supported.
2
1=Write Uncorrectable is 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
Table 90 Identify device information --Continued—