Seagate ST9100826A User Manual

Momentus 5400 FDE Product Manual, Rev. C

35

The Identify Device command (command code EC

H

) transfers information about the drive to the host following 

power up. The data is organized as a single 512-byte block of data. All reserved bits or words should be set to 
zero. Parameters listed with an “x” are drive-specific or vary with the state of the drive. See Section 2.0 on 
page 5 for default parameter settings.

The following commands contain drive-specific features that may not be included in the Draft ATA-7 Standard.   

  

      

0

Configuration information:

 

• Bit 15: 0 = ATA; 1 = ATAPI

 

• Bit 7: removable media

 

• Bit 6: removable controller

 

• Bit 0: reserved

0C5A

H

1

Number of logical cylinders

16,383

2

ATA-reserved

0000

H

3

Number of logical heads

16

4

Retired

0000

H

5

Retired

0000

H

6

Number of logical sectors per logical track: 63

003F

H

7–9

Retired

0000

H

10–19

Serial number: (20 ASCII characters, 0000

H

 = none)

ASCII

20

Retired

0000

H

21

Retired

0400

H

22

Obsolete

0000

H

23–26

Firmware revision

 

(8 ASCII character string, padded with blanks to end of string)

x.xx

27–46

Drive model number (40 ASCII characters, padded with blanks 
to end of string)

ST9120826A

 

ST9100826A

 

ST980821A

 

ST960814A

 

ST940811A

47

(Bits 7–0) Maximum sectors per interrupt on Read multiple and 
Write multiple (16)

8001

H

48

Reserved

0000

H

49

Standard Standby timer, IORDY supported and may be disabled

2F00

H

50

ATA-reserved

4000

H

51

PIO data-transfer cycle timing mode

0200

H

52

Retired

0200

H

53

Words 54–58, 64–70 and 88 are valid

0007

H

54

Number of current logical cylinders 

H

55

Number of current logical heads 

H

56

Number of current logical sectors per logical track

H

57–58

Current capacity in sectors

H