Product manual

Barracuda 7200.7 Serial ATA Product Manual, Rev. C 37
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 log-
ical 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 2.2 for related information)
*Note: The maximum value allowed in this
field is: 0FFFFFFFh (268,435,455 sec-
tors, 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.
ST3160023AS = 0FFFFFFFh*
ST3160021AS = 0FFFFFFFh*
ST3120026AS = 234,441,648
ST3120022AS = 234,441,648
ST380013AS = 156,301,488
ST380011AS = 156,301,488
ST340014AS = 78,165,360
62 Retired 0000
H
63 Multiword DMA active and modes sup-
ported (see note following this table)
xx07
H
64 Advanced PIO modes supported (modes
3 and 4 supported)
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
Table 8: Drive-specific commands
Word Description Value