Set feature commands – Maxtor DiamondMax 6800 User Manual

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INTERFACE COMMANDS

7 – 6

Set Feature Commands

Set Features Mode

Enables or disables features supported by the drive. When the drive receives this command it:

1. Sets BSY,
2. Checks the contents of the Features register,
3. Clears BSY and
4. Generates an interrupt.

If the value of the register is not a feature supported by the drive, the command is aborted.
The acceptable values in the Features register are defined as follows:

VALUE

DESCRIPTION

02h*

Enabled write cache

03h

Set transfer mode based on value in Sector Count register

44h

Length of data appended on Read Long/Write Long commands specified in the
Identify Device information

55h

Disable read look-ahead feature

66h*

Disable reverting to power-on defaults

82h

Disable write cache

AAh*

Enable read look-ahead feature

BBh*

4 bytes of Maxtor specific data appended on Read Long/Write Long commands

CCh

Enable reverting to power-on defaults

* Enabled at power up by default.