AT Command Set
WD Scorpio MX375M
32
RELEASED 11/17/10 (WD CONFIDENTIAL)
2679-771293-A01
4.3
Identify Device (ECh)
The Identify Device command transfers 512 bytes of data that specify the drive’s parameters. Table 4-7
lists the parameters read by the host.
Table 4-7. Identify Device Command
WORD
FIELD DESCRIPTION
VALUE
0
General Configuration
427Ah
1
Obsolete
0
2
Specific Configuration
XXXX
3
Obsolete
0
4
Retired
0
5
Retired
0
6
Obsolete
0
7-8
Reserved for assignment by the CompactFlash™ Association
0
9
Retired
0
10-19
Serial Number (ATA String)
WDnnnnnnnn
20
Retired
0
21
Retired
0
22
Obsolete
0
23-26
Firmware Revision (ATA String)
nnnn
27-46
Model Numbers (ATA String)
“WDC WD5000BPKT-nnnnnn”
“WDC WD7500BPKT-nnnnnn”
47
READ/WRITE MULTIPLE support
8010h
48
Trusted Computing feature set options
0
49
Capabilities
Bit 14-15: 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
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
53
Bit 8-15: Free-fall Control Sensitivity
00h = Vendor’s recommended setting
01h-FFh = Sensitivity level. A larger number is a
more sensitive setting.
Bit 7-3: Reserved
Bit 2: If set, the fields reported in word 88 are valid
Bit 1: If set, the fields reported in words (70:64) are valid
0007h
54-58
Obsolete
0
59
Current Blocking Factor
Value set with Set Multiple command
XX
60-61
Total number of user addressable logical sectors (DWord)
WDC WD5000BPKT (976,773,168)
WDC WD7500BPKT (1,465,149,168)
