Identify Device Command - Seagate ST320LT020 - 9YG142 Product Manual

4.3.1

Identify Device command

The Identify Device command (command code EC
organized as a single 512-byte block of data, whose contents are shown in the table on page 27. All reserved bits or words should be set
to zero. Parameters listed with an "x" are drive-specific or vary with the state of the drive.
The following commands contain drive-specific features that may not be included in the Serial ATA specification.
W D
ORD ESCRIPTION
Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
0 • Bit 7: removable media
• Bit 6: removable controller
• Bit 0: reserved
1 Number of logical cylinders
2 ATA-reserved
3 Number of logical heads
4 Retired
5 Retired
6 Number of logical sectors per logical track: 63
7–9 Retired
10–19 Serial number: (20 ASCII characters, 0000
20 Retired
21 Retired
22 Obsolete
23–26 Firmware revision (8 ASCII character string, padded with
blanks to end of string)
27–46 Drive model number: (40 ASCII characters, padded with blanks
to end of string)
47 (Bits 7–0) Maximum sectors per interrupt on Read multiple and
Write multiple (16)
48 Reserved
49 Standard Standby timer, IORDY supported and may be dis-
abled
50 ATA-reserved
51 PIO data-transfer cycle timing mode
52 Retired
53 Words 54–58, 64–70 and 88 are valid
54 Number of current logical cylinders
55 Number of current logical heads
56 Number of current logical sectors per logical track
57–58 Current capacity in sectors
59 Number of sectors transferred during a Read Multiple or Write
Multiple command
M T P
OMENTUS HIN RODUCT
) transfers information about the drive to the host following power up. The data is
H
H
M , R . F
ANUAL EV
V
ALUE
0C5A
H
16,383
0000
H
16
0000
H
0000
H
003F
H
0000
H
= none) ASCII
0000
H
0400
H
0000
H
x.xx
ST320LT020 - 9YG142
ST250LT003 - 9YG14C
ST160LT003 - 9YG141
8010
H
0000
H
2F00
H
0000
H
0200
H
0200
H
0007
H
xxxx
H
xxxx
H
xxxx
H
xxxx
H
xxxx
H
23