Identify Device (Ech); Table 4-7 Identify Device Command - Western Digital Blue WD20SPZX Technical Reference Manual

Log
Address
E2h-FFh
RO – Read Only
R/W – Read / Write
SMART – Supported by B0h command code.
ExtLog – Supported by 2Fh/3Fh command code.
VS – Vendor Specific
SCT – SMART Command Transport
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
0
Obsolete (Number of logical cylin-
1
2
3 Obsolete (Number of logical Heads)
4-5
Obsolete (Number of logical sectors
6
Reserved for assignment by the
7-8
CompactFlash™ Association
9
10-19 Serial Number (ATA String)
20-21
22
23-26 Firmware Revision (ATA String)
27-46 Model Numbers (ATA String)
ATA Command Set
Log Name
Reserved
FIELD DESCRIPTION
General Configuration
150 = ATA device
X 14:8 Retired
X 7:6 Obsolete
X 5:3 Retired
V 2 Incomplete response
X 1Retired
0 Reserved
ders)
Specific Configuration
Retired
per logical track)
Retired
Retired
Obsolete
WESTERN DIGITAL CONFIDENTIAL
- 40 -
WD- ACS- R/W
Feature Feature
Set Set
N/A
F=fixed
V=variable
Drive Program
X= not defined
Power-on Default Value
F
X
X
X
V
X
X
V
X
X
X
F
X
V WDnnnnnnnnnnnn
X
X
F
F WDC WD20SPZX-nnnnnnn
Access
427Ah
3FFFh
C837h
0010h
0000h
003Fh
0000h
0000h
0000h
0000h
nn.nnnnn