Maxtor 1925 - Manual (Page 48)

ATA Bus Interface and ATA Commands
Quickview 40 20/30/40GB AT 5-5
Identify Drive Command
This command allows the host to receive parameter information from the drive.
When the command is received, the drive:
1. Sets BSY
2. Stores the required parameter information in the sector buffer
3. Sets the DRQ bit
4. Generates an interrupt
The host may then read the information out of the sector buffer. Parameter words in
the buffer are shown in Table 5-2.
Note: All reserved bits or words should be zeroes.
Table 5-2
Identify Drive Command Parameters
Word CONTENT DESCRIPTION
0 General configuration bit-significant information:
15: 0 = ATA device
14-8: Retired
7: 1 = removable media device
6: Obsolete
5-3: Retired
2: Response incomplete
1: Retired
0: Reserved
1 Obsolete
2 Specific configuration
3 Obsolete
4-5 Retired
6 Obsolete
7-8 Reserved for assignment by the CompactFlash Association
9 Retired
10-19 Serial number (20 ASCII characters)