Hitachi HTS725050A9A364 Datasheet download pdf (Page 90)

7K500 OEM Specification

Page 90 of 176

Word Content Description

00 045xH 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 device

6 (=1):

1=fixed device

* 5 (=0):

1=spindle motor control option implemented

* 4 (=1):

1=head switch time > 15 us

* 3 (=1):

1=not MFM encoded

2 (=x):

1=Identify data incomplete

* 1 (=1):

1=hard sectored

0 (=0):

Reserved

01 Note.2 Number of cylinders in default translate mode

02 xxxxh Specific configuration

C837h SET FEATURES subcommand is not required to spin-up

and IDENTIFY DEVICE response is complete

37C8h SET FEATURES subcommand is required to spin-up and

IDENTIFY DEVICE response is incomplete

03 Note.2 Number of heads in default translate mode

04-05 0 * Reserved

06 003FH Number of sectors per track in default translate mode

07-09 0 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 Note.2 * Buffer size in number of sectors

22 00xxH * Obsolete

23-26 XXXX Microcode version in ASCII

27-46 Note.2 Model number in ASCII

47 8010H Maximum number of sectors that can be transferred per interrupt on Read

and Write Multiple commands

15-8 :

(=80h)

7-0 :

Maximum number of sectors that can be transferred per

interrupt.

Note.1 The ‘*’ mark in ‘Content’ field indicates the use of those parameters that are vendor specific.

Note.2 See following table “Table 64 Number of cylinders/heads/sectors by models for

HTS7250XXA9A3XX” on Page 100

Table 55 Identify device information

1 2 ... 85 86 87 88 89 90 91 92 93 94 95 ... 175 176

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Hitachi HTS725050A9A364 Datasheet Page 90

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