IBM DTTA-351010 Hard Drive Specifications - Page 113

Serial number in ASCII 0 = not specified

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Word 00 01 02 03 04 05 06 07 08 09 10 19 20 21 22 23 26 27 46 47 48 Content Description 045AH Drive classification, bit assignments: 15(=0): 1=ATAPI device, 0=ATA device * 14(=0): 1=format speed tolerance gap required * 13(=0): 1=track offset option available * 12(=0): 1=data strobe offset option available * 11(=0): 1=rotational speed tolerance > 0.5% * 10(=1): 1=disk transfer rate > 10 Mbps * 9(=0): 1=disk transfer rate > 5 Mbps but

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Word
Content
Description
00
045AH
Drive classification, bit assignments:
15(=0): 1=ATAPI device, 0=ATA device
*
14(=0): 1=format speed tolerance gap required
*
13(=0): 1=track offset option available
*
12(=0): 1=data strobe offset option available
*
11(=0): 1=rotational speed tolerance > 0.5%
*
10(=1): 1=disk transfer rate > 10 Mbps
*
9(=0): 1=disk transfer rate > 5 Mbps but <= 10 Mbps
*
8(=0): 1=disk transfer rate <= 5 Mbps
7(=0): 1=removable cartridge drive
6(=1): 1=fixed drive
*
5(=0): 1=spindle motor control option implemented
*
4(=1): 1=head switch time > 15 us
*
3(=1): 1=not MFM encoded
*
2(=0): 1=soft sectored
*
1(=1): 1=hard sectored
0(=0): Reserved
01
xxxxH
Number of cylinders in default translate mode
02
0
*
Number of removable cylinders
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
XXXXH
*
Buffer size in 512 byte increments
A value between 03A0H and 03B1H (model dependent)
22
0022H
*
Number of ECC bytes
(Vendor unique length selected via set feature cmd)
23 26
XXXX
Microcode version in ASCII
27 46
XXXX
Model number in ASCII
47
8010H
15 8
80h
70
Maximum number of sectors that can be
transferred per interrupt on Read and Write
Multiple commands
48
0000H
Reserved
Figure 79. Identify device information
Command Descriptions
105