Ultrastar 7K2
HGST Hard Disk Drive Technical Reference Manual
38
Identify Device (ECh)
The Identify Device command transfers 512 bytes of data that specify the drive’s parameters. Table 5-8 lists
the parameters read by the host
Table 13 Identify Device Command
WORD
FIELD DESCRIPTION
POWER-ON DEFAULT
VALUE
0
General Configuration
427Ah
1
Obsolete
3FFFh
2
Specific Configuration
C837h
3
Obsolete
0010h
4-5
Retired
0000h
6
Obsolete
003Fh
7-8
Reserved for assignment by the CompactFlash™ Association
0000h
9
Retired
0000h
10-19
Serial Number (ATA String)
nnnnnnnn
20-21
Retired
0000h
22
Obsolete
0000h
23-26
Firmware Revision (ATA String)
“nnnnnnn”
27-46
Model Numbers (ATA String)
“HGST HUS722T2TALA604”
“HGST HUS722T1TALA604”
47
READ/WRITE MULTIPLE
support Bit 15-8: 80h
Bit 7-0: 00h: Reserved
01h-FFh = Maximum number of logical sectors that shall
be transferred per DRQ data block on READ/WRITE
MULTIPLE commands
8010h
48
Trusted Computing feature set
options Bit 15: Shall be cleared to
zero
Bit 14: Shall be set to one
Bit 13-1: Reserved for the Trusted Computing Group
Bit 0: If set, Trusted Computing feature set is
supported
4000h
49
Capabilities
Bit 15-14: Reserved for the IDENTIFY PACKET
DEVICE command.
Bit 13: If set, 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: If set, IORDY supported
Bit 10: If set, IORDY may be
disabled Bit 9: If set, LBA supported
Bit 8: If set, DMA supported
Bit 7-2: Reserved
Bit 1: Current Long Physical Alignment Setting
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
0000h
