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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 | |
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| Configuration information: |
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| • Bit 15: 0 = ATA; 1 = ATAPI | 0C5AH | |
0 | • Bit 7: removable media | ||
| • Bit 6: removable controller |
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| • Bit 0: reserved |
| |
1 | Number of logical cylinders | 16,383 | |
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2 | 0000H | ||
3 | Number of logical heads | 16 | |
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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 | x.xx | ||
(8 ASCII character string, padded with blanks to end of string) | |||
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Drive model number: |
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(40 ASCII characters, padded with blanks to end of string) |
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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 | xxxxH | |
or Write Multiple command |
Barracuda XT Series SATA Product Manual, Rev. C | 23 |