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INTERFACE COMMANDS
7 – 10
Initialization CommandsInitialization Commands
Initialization CommandsInitialization Commands
Initialization Commands
Identify DriveIdentify Drive
Identify DriveIdentify Drive
Identify Drive
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 and
4. Generates an interrupt.
The host may then read the information out of the sector buffer. Parameter words in the buffer follow.
Note that all reserved bits or words should be zeroes.
WORD CONTENT DESCRIPTION
0 General configuration
15 = device (0 = ATA device, 1 = ATAPI)
14-8 = retired
7, 1 = removable media device
6, 1 = not removable controller and/or device
5-3 = retired
2 = response incomplete
1 = retired
0 = reserved
1 Number of logical cylinders
2Reserved
3 Number of logical heads
4-5 Retired
6 Number of logical sectors per logical track
7-8 Reserved
9 Retired
10 - 19 Drive serial number (20 ASCII characters)
20 - 21 Retired
22 Obsolete
23 - 26 Firmware revision (8 ASCII characters)
27 - 46 Model number (40 ASCII characters)
47 Maximum number of sectors that can be transferred per interrupt on read and write multiple commands
48 Reserved
49 Capabilities
15 - 14 = reserved
13 = standby timer (1 = values as specified in this standard are supported, 0 = values are Maxtor specific)
12 = reserved (advanced PIO mode support)
11, 1 = IORDY supported, 0 = IORDY may be supported
10, 1 = IORDY can be disabled
9-8 = shall be set to one. Used by Identify Packet Device command.
7-0 = not used