AT INTERFACE and ATA COMMANDS
6-
28 WA31273A / WA32543A / WA33203A / WA3216A / WA31083A / WA32162A
Table 6-6.
Identify Drive Information (continued)
Word
Description
55
Number of current logical heads
56
Number of current sectors per track
57-58
Current capacity in sectors
59
15-9 Reserved
8 1 = Multiple sector setting is valid
7-0 xxh = Current setting for number of sectors that can be
transferred per interrupt on R/W multiple commands
60-61
Total number of user addressable sectors (LBA mode only)
62
15-8 Single word DMA transfer mode active
7-0 Single word DMA transfer modes supported
63
15-8 Multiword DMA transfer mode active
7-0 Multiword DMA transfer modes supported
64
15-8 Reserved
7-0 Advanced PIO transfer modes supported
65
Minimum Multiword DMA xfer cycle time per Word
15-0 Cycle time in nanoseconds
66
Mfg.’s recommended Multiword DMA xfer cycle time
15-0 Cycle time in nanoseconds
67
Minimum PIO xfer cycle time without flow control
15-0 Cycle time in nanoseconds
68
Minimum PIO xfer cycle time with IORDY flow control
15-0 Cycle time in nanoseconds
69-70
Reserved (for advanced PIO mode support)
71-127
Reserved
128-159
Vendor specific
160-255
Reserved