Seagate manual 29

Momentus 5400.3 PATA Blade Server Product Manual, Rev. B
29
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 Table 6 on
page 26. 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 m ay not be included in the Draft A T A-6 Standard.
Word Description Valu e
0Configuration information:
• Bit 15: 0 = ATA; 1 = ATAPI
• Bit 7: removable media
• Bit 6: removable controller
• Bit 0: reserved
0C5AH
1Number of logical cylinders 16,383
2ATA-reserved 0000H
3Number of logical heads 16
4Retired 0000H
5Retired 0000H
6Number 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) ST9160821AB
ST9120822AB
ST9100828AB
ST980815AB
ST960815AB
ST9402116AB
47 (Bits 7–0) Maximum sectors per interrupt on Read multiple and
Write multiple (16) 8010H
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
53 Words 54–58, 64–70 and 88 are valid 0007H
54 Number of current logical cylinders xxxxH
55 Number of current logical heads xxxxH
56 Number of current logical sectors per logical track xxxxH