Seagate Barracuda XT Barracuda XT Series SATA Product Manual - Page 32

Description, Value, 0Fh 268

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SATA Interface www.seagate.com Word 48 49 50 51 52 53 54 55 56 57-58 59 60-61 62 63 64 65 66 67 68 69-74 75 76 77 78 79 Description Value Reserved Standard Standby timer, IORDY supported and may be disabled 0000H 2F00H ATA-reserved PIO data-transfer cycle timing mode Retired Words 54-58, 64-70 and 88 are valid Number of current logical cylinders Number of current logical heads Number of current logical sectors per logical track Current capacity in sectors Number of sectors transferred during a Read Multiple or Write Multiple command 0000H 0200H 0200H 0007H xxxxH xxxxH xxxxH xxxxH xxxxH Total number of user-addressable LBA sectors available (see Section 2.1 for related information) *Note: The maximum value allowed in this field is: 0FFFFFFFh (268,435,455 sectors, 137Gb). Drives with capacities over 137Gb 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. 0FFFFFFFh* Retired Multiword DMA active and modes supported (see note following this table) 0000H xx07H Advanced PIO modes supported (modes 3 and 4 supported) 0003H Minimum multiword DMA transfer cycle time per word (120 nsec) 0078H Recommended multiword DMA transfer cycle time per word (120 nsec) 0078H Minimum PIO cycle time without IORDY flow control (240 nsec) 00F0H Minimum PIO cycle time with IORDY flow control (120 nsec) ATA-reserved Queue depth Serial ATA capabilities Reserved for future Serial ATA definition Serial ATA features supported Serial ATA features enabled 0078H 0000H 001FH xxxxH xxxxH xxxxH xxxxH 32 Barracuda XT SATA Product Manual, Rev. D

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32
Barracuda XT SATA Product Manual, Rev. D
SATA Interface
www.seagate.com
48
Reserved
0000
H
49
Standard Standby timer, IORDY supported and may be dis-
abled
2F00
H
50
ATA-reserved
0000
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
xxxx
H
55
Number of current logical heads
xxxx
H
56
Number of current logical sectors per logical track
xxxx
H
57–58
Current capacity in sectors
xxxx
H
59
Number of sectors transferred during a Read Multiple
or Write Multiple command
xxxx
H
60–61
Total number of user-addressable LBA sectors available
(see Section 2.1 for related information)
*Note: The maximum value allowed in this field is:
0FFFFFFFh (268,435,455 sectors, 137Gb). Drives with
capacities over 137Gb 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.
0FFFFFFFh*
62
Retired
0000
H
63
Multiword DMA active and modes supported
(see note following this table)
xx
07
H
64
Advanced PIO modes supported (modes 3 and 4 sup-
ported)
0003
H
65
Minimum multiword DMA transfer cycle time per word (120
nsec)
0078
H
66
Recommended multiword DMA transfer cycle time per
word
(120 nsec)
0078
H
67
Minimum PIO cycle time without IORDY flow control (240
nsec)
00F0
H
68
Minimum PIO cycle time with IORDY flow control (120 nsec)
0078
H
69–74
ATA-reserved
0000
H
75
Queue depth
001F
H
76
Serial ATA capabilities
xxxx
H
77
Reserved for future Serial ATA definition
xxxx
H
78
Serial ATA features supported
xxxx
H
79
Serial ATA features enabled
xxxx
H
Word
Description
Value