WD Scorpio ML160M
AT Command Set
2679-701205-A00
RELEASED 1/16/09 (WD CONFIDENTIAL)
27
4.3
Identify Device (ECh)
The Identify Device command transfers 512 bytes of data that specify the drive’s parameters.
Table 4-5 lists the parameters read by the host.
Table 4-5. Identify Device Command
WORD
FIELD DESCRIPTION
VALUE
0
General Configuration
427Ah
1
Obsolete
0
2
Specific Configuration
C837h = Device does not require Set Feature
subcommand to spin-up and Identify Device
response is incomplete
C837h
3
Obsolete
0
4-5
Retired
0
6
Obsolete
0
7-8
Reserved for assignment by the CompactFlash™ Association
0
9
Retired
0
10-19
Serial Number
WDnnnnnnnn
20-21
Retired
0
22
Obsolete
0
23-26
Firmware Revision
nnnn
27-46
Model Numbers
““WDC WD800BEVE-nnnnnn”
“WDC WD1200BEVE-nnnnnn”
“WDC WD1600BEVE-nnnnnn”
“WDC WD2500BEVE-nnnnnn”
“WDC WD3200BEVE-nnnnnn”
47
Bit 15-8: 80h
Bit 7-0: 00h = Reserved
01h-FFh = Maximum number of logical sectors that shall
be transferred perDRQ data block on READ/
WRITE MULTIPLE command
8010h
48
Reserved
0
49
Capabilities
Bit 15-14: Reserved for the IDENTIFY PACKET DEVICE
command.
Bit 13: 1 = Standby timer values as specified in this
standard are supported
0 = Standby timer values shall be managed by the
device
Bit 12: Reserved for the IDENTIFY PACKET DEVICE
command.
Bit 11: 1 = IORDY supported
0 = IORDY may be supported
Bit 10: 1 = IORDY may be disabled
Bit 9: 1 = LBA supported
Bit 8: 1 = DMA supported.
Bit 7-0: Retired
2F00h
50
Capabilities
Bit 15: Shall be cleared to zero.
Bit 14: Shall be set to one.
Bit 13-2: Reserved.
Bit 1: Obsolete
Bit 0: Shall be set to one to indicate a device specific
Standby timer value minimum
4001h
51-52
Obsolete
0
