Figure 84. Identify Device Information (1 Of 6) - IBM IC35L020 - Deskstar 20 GB Hard Drive Specifications

The Identify Device command requests the device to transfer configuration information to the host. The
device will transfer a sector to the host containing the information described in the following figure.
In the following table the bullet symbol (•) means the word is for vendor specific use.
Word Content
00 045AH
or
045EH
01 xxxxH
02 37C8H
03 00xxH
04 0
05 0
06 003FH
07 0000H
08 0000H
09 0000H
10-19 XXXX
20 0003H
21 XXXXH
22 0028H
23-26 XXXX
27-46 XXXX
47 8010H
0000H
48
49 xF00H

Figure 84. Identify Device Information (1 of 6)

Drive classification, bit assignments:
15(=0): 1=ATAPI device, 0=ATA device
14– 8 : retired
7(=0): 1=removable cartridge drive
6(=1): 1=fixed drive
5– 3 : retired
2(=0): Response incomplete
1 : retired
0(=0): Reserved
Number of cylinders in default translate mode
Specific Configuration
37C8H: Need Set Feature for spin-up after power-up
Identify Device is incomplete
Number of heads in default translate mode
O
Reserved
O
Reserved
Number of sectors per track in default translate mode
O
Number of bytes of sector gap
O
Number of bytes in sync field
O
Reserved
Serial number in ASCII (0 = not specified)
O
Controller type:
0003: dual ported, multiple sector buffer with look-
ahead read
O
Buffer size in 512-byte increments
O
Number of ECC bytes
(Vendor unique length selected via set feature cmd)
Microcode version in ASCII
Model number in ASCII
15–8 80h
7–0 Maximum number of sectors that can be transferred
per interrupt on Read and Write Multiple commands
Reserved
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
9 (=1) Reserved
8 (=0) Reserved
O
7–0 (=0) Reserved
Deskstar 60 GXP Hard disk drive specification
Description
112