Seagate ST1000NM0008, Product Manual

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Seagate Enterprise Capacity 3.5 HDD v5.1 Product Manual, Rev. D 26
4.3.1 Identify Device command
The Identify Device command (command code EC
H
) transfers information about the drive to the host following power up. The data is
organized as a single 512-byte block of data, whose contents are shown in Table 8 on page 24. 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 6 for default
parameter settings.
The following commands contain drive-specific features that may not be included in the Serial ATA specification.
Table 9 Identify Device commands
Word Description Value
0
Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
• Bit 14-8: Retired
• Bit 7-6: Obsolete
• Bit 5-3: Retired
• Bit 0: Reserved
0C5A
H
1 Number of logical cylinders 16,383
2 Specific Configuration C837
H
3 Number of logical heads 16
4 Retired 0000
H
5 Retired 0000
H
6 Number of logical sectors per logical track: 63 003F
H
7–9 Retired 0000
H
10–19 Serial number: (20 ASCII characters, 0000
H
= none) ASCII
20 Retired 0000
H
21 Retired 0000
H
22 Obsolete 0000
H
23–26 Firmware revision (8 ASCII character string, padded with blanks to end of string) x.xx
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) 8010
H
48 Trusted computing feature set options 4000
H
49 Standard Standby timer, IORDY supported and may be disabled 2F00
H
50 Capabilities 4000
H
51 PIO data-transfer cycle timing mode 0200
H
52 Obsolete 0200
H
53 Words 64–70 and 88 are valid 0007
H
54 Number of current logical cylinders xxxx
H
55 Number of current logical heads xxxx
H
56 Number of current logical sectors per logical track xxxx
H
57–58 Current capacity in sectors xxxx
H
59 Number of sectors transferred during a Read Multiple or Write Multiple command 0010
H
60–61
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).
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.
ST2000NM0008 = 0FFFFFFFh*
ST2000NM0018 = 0FFFFFFFh*
ST1000NM0008 = 0FFFFFFFh*
ST1000NM0018 = 0FFFFFFFh*
62 Retired 0000
H