Word

Description

Value

 

 

 

53

Words 54–58, 64–70 and 88 are valid

0007H

 

 

 

54

Number of current logical cylinders

xxxxH

 

 

 

55

Number of current logical heads

xxxxH

 

 

 

56

Number of current logical sectors per logical track

xxxxH

 

 

 

57–58

Current capacity in sectors

xxxxH

 

 

 

59

Number of sectors transferred during a Read Multiple or Write Multiple

xxxxH

 

command

 

 

 

 

60–61

Total number of user-addressable LBA sectors available

0FFFFFFFh*

 

(see Section 2.2 for related information)

 

 

*Note: The maximum value allowed in this field is: 0FFFFFFFh

 

 

(268,435,455 sectors, 137 Gbytes). Drives with capacities over 137

 

 

Gbytes will have 0FFFFFFFh in this field and the actual number of

 

 

user-addressable LBAs specified in words 100-103. This is required

 

 

for drives that support the 48-bit addressing feature.

 

 

 

 

62

Retired

0000H

 

 

 

63

Multiword DMA active and modes supported (see note following this

xx07H

 

table)

 

 

 

 

64

Advanced PIO modes supported (modes 3 and 4 supported)

0003H

 

 

 

65

Minimum multiword DMA transfer cycle time per word (120 nsec)

0078H

 

 

 

66

Recommended multiword DMA transfer cycle time per word (120

0078H

 

nsec)

 

 

 

 

67

Minimum PIO cycle time without IORDY flow control (240 nsec)

00F0H

 

 

 

68

Minimum PIO cycle time with IORDY flow control (120 nsec)

0078H

 

 

 

69–74

ATA-reserved

0000H

 

 

 

75

Queue depth

0000H

 

 

 

76

Serial ATA capabilities

xxxxH

 

 

 

77

Reserved for future Serial ATA definition

xxxxH

 

 

 

78

Serial ATA features supported

xxxxH

 

 

 

79

Serial ATA features enabled

xxxxH

 

 

 

80

Major version number

003EH

 

 

 

81

Minor version number

0000H

 

 

 

82

Command sets supported

364BH

 

 

 

34

SV35.3 Series Serial ATA Product Manual, Rev. B

Page 40
Image 40
Seagate ST31000340SV, ST3250310SV, ST3750330SV, ST3500320SV manual XxxxH