Maxtor 4320 manual Set Feature Commands, Set Features Mode, Value Description

INTERFACECOMMANDS

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.

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