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Table 107 Identify device information
Word
Content
Description
00
045AH
Drive classification, bit assignments:
or
15 (=0)
1=ATAPI device, 0=ATA device
045EH
14-8
Retired
7 (=0)
1=removable cartridge device
6 (=1)
1=fixed device
5-3
Retired
2 (=0)
Response incomplete
1
Retired
0 (=0)
Reserved
01
xxxxH
Number of cylinders in default translate mode
02
C837H
Specific Configuration
37C8H
Need Set Feature for spin-up after power-up
Identify Device is incomplete
738CH
Need Set Feature for spin-up after power-up
Identify Device is complete
8C73H
No Need Set Feature for spin-up after power-up
Identify Device is incomplete
C837H
No Need Set Feature for spin-up after power-up
Identify Device is complete
03
00xxH
Number of heads in default translate mode
04
0
* Reserved
05
0
* Reserved
06
003FH
Number of sectors per track in default translate mode
07
0000H
* Number of bytes of sector gap
08
0000H
* Number of bytes in sync field
09
0000H
* Reserved
10-19
XXXX
Serial number in ASCII (0 = not specified)
20
0003H
* Controller type:
0003: dual ported, multiple sector buffer with look-ahead read
21
0000H
* Retired
22
0038H
* Reserved
23-26
XXXX
Microcode version in ASCII
27-46
XXXX
Model number in ASCII
47
80xxH
15-8 (=80H) 80h
7-0 (=xxH)
Maximum number of sectors that can be transferred per interrupt on Read
and Write Multiple commands
If logical sector size is 512 bytes, the content of this bits are 10H.
If logical sector size is 4096 bytes, the content of this bits are 02H.
48
4000H
Trusted Computing feature set options
15 (=0)
Shall be cleared to zero
14 (=1)
Shall be set to one
13-1 (=0)
Reserved for the Trusted Computing Group
0 (=0)
0=Trusted Computing feature set is not supported
49
xF00H
Capabilities, bit assignments:
15-14 (=0)
Reserved
13
Standby timer
(=1)
values as specified in ATA standard are supported
(=0)
values are vendor specific
12 (=0)
Reserved
11 (=1)
IORDY Supported
10 (=1)
IORDY can be disabled
164
Hard Disk Drive Specification