HOST SOFTWARE INTERFACE

CommandRegister

Contains code for the command to be performed. Additional command information should be written to the task file before the Command register is loaded. When this register is written, the BUSY bit in the Status register sets, and interrupt request to the host clears; invalid commands abort. (Detailed information on interface commands is given in Section 7.) Hex values for valid command formats follow:

Read Commands

 

 

 

Read Sector(s)

20h

Normal reads; retries enabled

 

21h

Normal reads; retries disabled

 

22h

Read Long; retries enabled

 

23h

Read Long; retries disabled

Read Verify Sector(s)

40h

Retries

enabled

 

41h

Retries

disabled

Read Sector Buffer

E4h

 

 

Read Multiple

C4h

 

 

Read DMA

 

C8h

 

 

C9h

No retries

Write Commands

 

 

 

Write Sector(s)

30h

Normal writes; retries enabled

 

31h

Normal writes; retries disabled

 

32h

Write Long; retries enabled

 

33h

Write Long; retries disabled

Write Verify Sector(s)

3Ch

 

 

Write Sector Buffer

E8h

 

 

Write Multiple

C5h

 

 

Write DMA

CAh

 

 

 

CBh

No retries

Mode Set/Check Commands

 

 

 

Set Features

EFh

 

 

Set Multiple Mode

C6h

 

 

Power Mode Commands

 

 

 

Standby Immediate

94/E0h

Stops drive spindle; do not change time-out value

Idle Immediate

95/E1h

Starts spindle; do not change time-out value

Standby

96/E2h

Stops spindle; change time-out value

Idle

97/E3h

Starts spindle; change time-out value

Check Power Mode

98/E5h

 

 

Set Sleep Mode

99/E6h

 

 

Initialization Commands

 

 

 

Identify Drive

ECh

 

 

Initialize Drive Parameters

91h

 

 

Re-calibrate

1xh

 

 

Seek, Format, and Diagnostic Commands

 

 

Seek

7xh

 

 

Format Track

50h

 

 

Execute Drive Diagnostic

90h

 

 

S.M.A.R.T. Commands

 

 

 

Execute S.M.A.R.T.

B0h

 

 

6 – 3

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Maxtor 51536U3, 51024U2, 52049U4, 53073U6, 54098U8 specifications CommandRegister

51536U3, 53073U6, 52049U4, 54098U8, 51024U2 specifications

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