SET Features X’EF’, ’Bb’, ’Cc’ | Fujitsu MHW2040AC, MHW2060AC

5.3 Host Commands

(28) SET FEATURES (X’EF’)

The host system issues the SET FEATURES command to set parameters in the Features register for the purpose of changing the device features to be executed.

Upon receipt of this command, the device sets the BSY bit of the Status register and saves the parameters in the Features register. Then, the device clears the BSY bit, and generates an interrupt.

If the value in the Features register is not supported or it is invalid, the device posts an ABORTED COMMAND error.

Table 5.23 lists the available values and operational modes that may be set in the Features register.

Table 5.23 Features register values and settable modes

Features		Drive operation mode
Register		Drive operation mode
Register
X’02’	Enables the write cache function.
X’03’	Set the data transfer mode.	*1
X’05’	Enables the advanced power management function. *2
X’42’	Enables the Acoustic management function. *3
X’55’	Disables read cache function.
X’66’	Disables the reverting to power-on default settings after software reset.		(*1)
X’82’	Disables the write cache function.
X’85’	Set the advanced power management mode to Mode-0.
X’AA’	Enables the read cache function.
X’BB’	Specifies the transfer of 4-byte ECC for READ LONG and WRITE LONG
	commands.		(*1)
X’C2’	Disables the Acoustic management function.
X’CC’	Enables the reverting to power-on default settings after software reset.		(*1)
*1 Although there is a response to the command, nothing is done.
	At power-on or after hardware reset, the default mode is set as follows.
	Write cache function	: Enabled
	Transfer mode	: PIO Mode-4, Multiword DMA Mode-2
	Advanced power
	management function	: Enabled (Mode-1)
	Acoustic
	management function	: State keeping
	Read cache function	: Enabled

C141-E258

5-89

MHW2060AC, MHW2040AC specifications

The Fujitsu MHW2040AC and MHW2060AC are notable hard disk drives (HDDs) that have been widely used in various computing applications, especially in laptops and compact devices. These models are part of Fujitsu's commitment to providing reliable storage solutions that meet the demands of modern computing.

The MHW2040AC offers a storage capacity of 40 GB, while the MHW2060AC provides a slightly larger capacity at 60 GB. This range of storage makes both models suitable for users looking for dependable space for documents, multimedia files, and software applications. Both drives utilize a 2.5-inch form factor, ideal for mobile computing, as they are lightweight and designed to fit into space-constrained environments.

In terms of performance, both drives operate at a spindle speed of 5400 RPM. This speed strikes a balance between power consumption and performance, making these drives an efficient choice for everyday tasks, such as web browsing and office applications. The drives are equipped with an interface of Ultra ATA/133, which enables faster data transfer rates compared to older models, thereby enhancing overall system responsiveness.

The MHW2040AC and MHW2060AC also incorporate several advanced technologies to bolster their performance and reliability. One such feature is the use of a fluid dynamic bearing (FDB) for the spindle motor, which minimizes noise and vibration, thus improving the overall user experience. Additionally, both drives come with error correction technology that helps maintain data integrity by detecting and correcting errors during read and write operations.

Moreover, these HDDs feature a shock sensor that can detect sudden movements, allowing the drive to park its heads to prevent data loss and hardware damage. This is particularly beneficial in mobile environments where the risks of impact are higher.

Both the MHW2040AC and MHW2060AC are designed with energy-saving features, making them an environmentally responsible choice for energy-conscious consumers. Their low power consumption not only contributes to a reduced carbon footprint but also extends battery life for portable devices.

In summary, the Fujitsu MHW2040AC and MHW2060AC are reliable, efficient, and user-friendly hard disk drives that combine moderate capacities with advanced features designed to enhance performance, ensure data integrity, and extend device longevity. These drives are well-suited for a range of applications, making them a solid choice for users seeking dependable storage solutions.

Fujitsu MHW2040AC SET Features X’EF’, Features register values and settable modes, ’Bb’, ’Cc’

Models: MHW2060AC MHW2040AC

5.3 Host Commands

(28) SET FEATURES (X’EF’)

Table 5.23 Features register values and settable modes

X’BB’

X’CC’

MHW2060AC, MHW2040AC specifications