Identify Device Command - Seagate ST1000NX0303 Product Manual

5.3.1

Identify Device command

The Identify Device command (command code EC
organized as a single 512-byte block of data, whose contents are shown in Table 7 on page 32. 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. See Section 2.0 on page 8 for default
parameter settings.
The following commands contain drive-specific features that may not be included in the Serial ATA specification.
Table 8: Identify Device commands
Word Description
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 Trusted computing feature set options
49 Standard Standby timer, IORDY supported and may be disabled
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
Total number of user-addressable LBA sectors available
(see Section 2.2 for related information)
*Note: The maximum value allowed in this field is: 0FFFFFFFh (268,435,455 sectors, 137GB).
60–61
Drives with capacities over 137GB will have 0FFFFFFFh in this field and the actual number
of user-addressable LBAs specified in words 100-103. This is required for drives that support
the 48-bit addressing feature.
62 Retired
Seagate Enterprise Capacity 2.5 HDD v3 SATA Product Manual, Rev. E
) transfers information about the drive to the host following power up. The data is
H
= none)
H
Value
0C5A
H
3FFF
H
0000
H
16
0000
H
0000
H
003F
H
0000
H
ASCII
0000
H
0000
H
0004
H
x.xx
8010 for 5xxE/5xxN
H
8002 for 4KN
H
4000
H
2F00
H
4000
H
0200
H
0200
H
0007
H
xxxx
H
xxxx
H
xxxx
H
xxxx
H
xxxx
H
0FFFFFFFh*
0000
H
34