Seagate ST9250412AS Momentus 7200 FDE.1 SATA Product Manual - Page 42

Identify Device command

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4.2.5 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 below. 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. Word 0 1 2 3 4 5 6 7-9 10-19 20 21 22 23-26 27-46 Description Configuration information: • Bit 15: 0 = ATA; 1 = ATAPI • Bit 7: removable media • Bit 6: removable controller • Bit 0: reserved Number of logical cylinders ATA-reserved Number of logical heads 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) 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 Value 0C5AH 16,383 0000H 16 0000H 0000H 003FH 0000H ASCII 0000H 0400H 0000H x.xx ST9320424AS ST9250424AS ST9160414AS ST9120414AS ST9320424ASG ST9250424ASG ST9160414ASG ST9120414ASG ST980414ASG 8001H 0000H 2F00H 0000H 0200H 0200H 36 Momentus 7200 FDE.1 SATA Product Manual, Rev. B

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36
Momentus 7200 FDE.1 SATA Product Manual, Rev. B
4.2.5
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
below. 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 specifica-
tion.
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)
ST9320424AS
ST9250424AS
ST9160414AS
ST9120414AS
ST9320424ASG
ST9250424ASG
ST9160414ASG
ST9120414ASG
ST980414ASG
47
(Bits 7–0) Maximum sectors per interrupt on Read multiple
and Write multiple (16)
8001
H
48
Reserved
0000
H
49
Standard Standby timer, IORDY supported and may be dis-
abled
2F00
H
50
ATA-reserved
0000
H
51
PIO data-transfer cycle
timing mode
0200
H
52
Retired
0200
H