Cactus Technologies, Limited
5.1.1.
Identify Drive—ECH
The Identify Drive command enables the host to receive parameter information from the
drive. This command has the same protocol as the Read Sector(s) command. The parameter
words in the buffer have the arrangement and meanings defined in Table 5-8. All reserved
bits or words are zero. Table 5-8 is the definition for each field in the Identify Drive
Information.
Table 5-8. Identify Drive Information
Word
Address
Default
Value
Total
Bytes
Data Field Type Information
0
0040H
2
General configuration bit-significant information.
1
XXXXH
2
Default number of cylinders; capacity dependent.
2
C837H
2
Reserved.
3
00XXH
2
Default number of heads; capacity dependent.
4
XXXXH
2
Number of unformatted bytes per track.
5
XXXXH
2
Number of unformatted bytes per sector.
6
XXXXH
2
Default number of sectors per track; capacity dependent.
7-8
XXXXH,XXX
XH
4
Number of sectors per drive (Word 7 = MSW, Word 8 =
LSW); capacity dependent.
9
000EH
2
Reserved.
10-19
aaaa
20
Serial number in ASCII (Right Justified).
20
XXXXH
2
Retired
21
XXXXH
2
Retired
22
0003FH
2
Obsolete
23-26
aaaa
8
Firmware revision in ASCII . Big Endian Byte Order in Word.
27-46
aaaa
40
Model number in ASCII (Left Justified) Big Endian Byte Order
in Word.
47
8001H
2
Maximum number of sectors on Read/Write Multiple
command
48
4000H
2
Double Word not supported.
49
2F00H
2
Capabilities: DMA Supported (bit 8), LBA supported (bit 9).
50
4000H
2
Reserved.
51
0280H
2
PIO data transfer cycle timing mode
52
0000H
2
Single Word DMA data transfer cycle timing mode (not
supported).
53
0007H
2
Data fields 54-58,64-70 and 88 are valid.
54
XXXX
2
Current numbers of cylinders.
55
00XX
2
Current numbers of heads.
56
XXXX
2
Current sectors per track.
57-58
XXXX
4
Current capacity in sectors (LBAs) (Word 57 = LSW, Word 58
= MSW).
59
0000H
2
Multiple sector setting is valid; low byte is capacity
dependent.
60-61
XXXX
4
Total number of sectors addressable in LBA Mode.
62
0000H
2
Reserved
63
0007H
2
Multiword DMA modes 0-2 are supported; upper byte reflects
currently selected MWDMA mode.
64
0003H
2
Advanced PIO modes supported (modes 3 and 4)
65
0078H
2
Minimum MWDMA cycle time per word is 120ns.
66
0078H
2
Recommended MWDMA cycle time is 120ns.
Cactus Technologies Limited
-602 Series Industrial Grade SATA SSD Product Manual
v1.4
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