Seagate ST1000VX000 SV35 Series PATA Product Manual - Page 39

Identify Device command - firmware

Page 39 highlights

4.1.2 Identify Device command The Identify Device command (command code ECH) 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 the Table 6 on page 30. 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 3 for default parameter settings. The following commands contain drive-specific features that may not be included in the Draft ATA-7 Standard. Word 0 Description Configuration information: • Bit 15: 0 = ATA; 1 = ATAPI • Bit 7: removable media • Bit 6: removable controller • Bit 0: reserved Value 0C5AH 1 Number of logical cylinders 16,383 2 ATA-reserved 3 Number of logical heads 0000H 16 4 5 6 7-9 10-19 20 21 22 23-26 Retired Retired Number of logical sectors per logical track: 63 Retired Serial number: (20 ASCII characters, 0000H = none) Retired Retired Obsolete Firmware revision (8 ASCII character string, padded with blanks to end of string) 0000H 0000H 003FH 0000H ASCII 0000H 0400H 0000H x.xx 27-46 Drive model number (40 ASCII characters, padded with blanks to end of string) ST3500641AV ST3250824AV ST3160812AV 47 (Bits 7-0) Maximum sectors per interrupt on Read multiple and Write 8010H multiple (16) 48 Reserved 0000H 49 Standard Standby timer, IORDY supported and may be disabled 2F00H 50 ATA-reserved 0000H 51 PIO data-transfer cycle timing mode 0200H 52 Retired 0200H SV35 Series Product Manual, Rev. B 33

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SV35 Series Product Manual, Rev. B
33
4.1.2
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 the Table 6
on page 30. 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 3 for default parameter settings.
The following commands contain drive-specific features that may not be included in the
Draft ATA-7 Standard.
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
16,383
2
ATA-reserved
0000
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
0400
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)
ST3500641AV
ST3250824AV
ST3160812AV
47
(Bits 7–0) Maximum sectors per interrupt on Read multiple and Write
multiple (16)
8010
H
48
Reserved
0000
H
49
Standard Standby timer, IORDY supported and may be disabled
2F00
H
50
ATA-reserved
0000
H
51
PIO data-transfer cycle timing mode
0200
H
52
Retired
0200
H