4.3.1Identify 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
The following commands contain
Word | Description | Value | |
|
|
| |
| Configuration information: |
| |
| • Bit 15: 0 = ATA; 1 = ATAPI | 0C5AH | |
0 | • Bit 7: removable media | ||
| • Bit 6: removable controller |
| |
| • Bit 0: reserved |
| |
1 | Number of logical cylinders | 16,383 | |
|
|
| |
2 | 0000H | ||
3 | Number of logical heads | 16 | |
|
|
| |
4 | Retired | 0000H | |
5 | Retired | 0000H | |
6 | Number of logical sectors per logical track: 63 | 003FH | |
Retired | 0000H | ||
Serial number: (20 ASCII characters, 0000H = none) | ASCII | ||
20 | Retired | 0000H | |
21 | Retired | 0400H | |
22 | Obsolete | 0000H | |
Firmware revision (8 ASCII character string, padded with blanks to end | x.xx | ||
of string) | |||
|
| ||
Drive model number: (40 ASCII characters, padded with blanks to end |
| ||
of string) |
| ||
|
| ||
47 | (Bits | 8010H | |
multiple (16) | |||
48 | Reserved | 0000H | |
49 | Standard Standby timer, IORDY supported and may be disabled | 2F00H | |
50 | 0000H | ||
51 | PIO | 0200H | |
52 | Retired | 0200H | |
53 | Words | 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 | |
Current capacity in sectors | xxxxH | ||
59 | Number of sectors transferred during a Read Multiple or Write Multiple | xxxxH | |
command |
Video 3.5 HDD Product Manual, Rev. J | 29 |