Identify Device (Ech); Table 4-7 Identify Device Command - Western Digital caviar blue xl500s Technical Reference Manual

XL500S
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
1
2
3
4-5
6
7-8
9
10-19
20-21
22
23-26
27-46
47
48
49
50
51-52
2679-701211-A06
FIELD DESCRIPTION
General Configuration
Obsolete
Specific Configuration
C837h = Device does not require Set Feature subcommand
to spin-up and Identify Device response is incomplete
Obsolete
Retired
Obsolete
Reserved
Retired
Serial Number (ATA String)
Retired
Obsolete
Firmware Revision (ATA String)
Model Numbers (ATA String)
Read/Write Multiple support
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
commands
Reserved
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
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 vendor specific Standby
timer value minimum
Obsolete
RELEASED 10/21/10 (WD CONFIDENTIAL)
ATA Command Set
VALUE
427Ah
0
C837h
0
0
0
0
0
WDnnnnnnnn
0
0
nnnn
"WDC WD5000AAKX-nnnnnn"
"WDC WD5000AAKS-nnnnnn"
"WDC WD3200AAKX-nnnnnn"
"WDC WD2500AAKX-nnnnnn"
8010h
0
2F00h
4001h
0
33