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–

Current capacity in sectors

xxxxH

58

 

 

 

 

 

59

Number of sectors transferred during a Read Multiple or Write Multiple

xxxxH

 

command

 

 

 

 

60–

Total number of user-addressable LBA sectors available

ST3200822AS = 0FFFFFFFh*

61

(see Section 2.2 for related information)

ST3160827AS = 0FFFFFFFh*

 

ST3160023AS = 0FFFFFFFh*

 

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

 

ST3160021AS = 0FFFFFFFh*

 

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

 

ST3120827AS = 234,441,648

 

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

 

ST3120026AS = 234,441,648

 

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

 

ST3120022AS = 234,441,648

 

that support the 48-bit addressing feature.

 

ST380817AS = 156,301,488

 

 

 

 

ST380013AS = 156,301,488

 

 

ST380011AS = 156,301,488

 

 

ST340111AS = 78,165,360

 

 

ST340014AS = 78,165,360

 

 

 

62

Retired

0000H

 

 

 

63

Multiword DMA active and modes supported (see note following this table)

xx07H

 

 

 

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 nsec)

0078H

 

 

 

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–

ATA-reserved

0000H

74

 

 

 

 

 

75

Queue depth

0000H

 

 

 

76–

ATA-reserved

0000H

79

 

 

 

 

 

80

Major version number

003EH

 

 

 

81

Minor version number

0000H

 

 

 

82

Command sets supported

306BH

 

 

 

83

Command sets supported

4001H

 

 

 

84

Command sets support extension

4000H

 

 

 

85

Command sets enabled

30xxH

 

 

 

86

Command sets enabled

0001H

 

 

 

87

Command sets enable extension

4000H

 

 

 

88

Ultra DMA support and current mode (see note following this table)

xx3FH

 

 

 

89

Security erase time

0000H

 

 

 

Barracuda 7200.7 Serial ATA Product Manual, Rev. N

29

Page 37
Image 37
Seagate ST340014AS, ST3120827AS, ST3120026AS, ST3120022AS, ST310005N1A1ASRK, ST3160023AS, ST3160021AS, ST3160827AS manual XxxxH