Seagate Exos 7E10 - Identify Device command

Seagate Exos 7E10 Serial ATA Product Manual, Rev. B 34
6.3.1 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 12 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 7 for
default parameter settings.
The following commands contain drive-specific features that may not be included in the Serial ATA specification.
Table 13 Identify device command
Word Description Value
0
Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
• Bit 7: removable media
• Bit 6: removable controller
• Bit 0: reserved
0C5A
H
1 Number of logical cylinders (obsoleted) 16,383
2 ATA-reserved C837
H
3 Number of logical heads (obsoleted) 16
4-5 Retired 0000
H
6 Number of logical sectors per logical track: 63 (obsoleted) 003F
H
7–9 Retired 0000
H
10–19 Serial number: (20 ASCII characters, 0000
H
= none) Reported in ASCII
20-21 Retired 0000
H
22 Obsolete 0000
H
23–26 Firmware revision (8 ASCII character string, padded with blanks to end of string) Reported in ASCII
27–46 Drive model number: (40 ASCII characters, padded with blanks to end of string) Reported in ASCII
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 ATA-reserved 4000
H
51 PIO data-transfer cycle timing mode 0200
H
52 Retired 0200
H
53 Words 54–58, 64–70 and 88 are valid 0007
H
54-58 Obsolete xxxx
H
59 Number of sectors transferred during a Read Multiple or Write Multiple command x5D10
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.
0FFFFFFFh*
62 Retired 0000
H
63 Multiword DMA active and modes supported (see note following this table) x0007
H
64 Advanced PIO modes supported (modes 3 and 4 supported) 0003
H
65 Minimum multiword DMA transfer cycle time per word (120 ns) 0078
H