Initialization Commands; Identify Drive - Maxtor DiamondMax 6800 Product Manual

Initialization Commands

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, 1 = ATAPI)
14-8 = not used
7 , 1 = removable media data
6, 1 = not removable controller and/or device
5-1 = reserved
0
1 Number of cylinders
2 Reserved
3 Number of logical heads
4-5 Not used
6 Number of logical sectors per track
7-9 Not used
10 - 19 Drive serial number (40 ASCII characters)
20 Not used
21 Buffer size in 512 byte increments (0000h = not specified)
22 Number of Maxtor specific bytes available on Read/Write Long commands
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 = reserved
7-0 = not used
INTERFACE COMMANDS
7 – 9