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Momentus 5400.6 SATA Product Manual, Rev. A
4.3.1 Identify Device commandThe 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 on page 27. 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
0C5AH
1 Number of logical cylinders 16,383
2 ATA-reserved 0000H
3 Number of logical heads 16
4 Retired 0000H
5 Retired 0000H
6 Number of logical sectors per logical track: 63 003FH
7–9 Retired 0000H
10–19 Serial number: (20 ASCII characters, 0000H = none) ASCII
20 Retired 0000H
21 Retired 0400H
22 Obsolete 0000H
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) ST9500325AS
ST9500325ASG
ST9320325AS
ST9320325ASG
ST9250315AS
ST9250315ASG
ST9160314AS
ST9160314ASG
ST9120315AS
47 (Bits 7–0) Maximum sectors per interrupt on Read multiple
and Write multiple (16) 8010H
48 Reserved 0000H
49 St andard Standby timer, IORDY supported and may be dis-
abled 2F00H
50 ATA-reserved 0000H
51 PIO data-transfer cycle timing mode 0200H
52 Retired 0200H
53 Words 54–58, 64–70 and 88 are valid 0007H
54 Number of current logical cylinders xxxxH