Sequential hit | Fujitsu MHW2060AC, MHW2040AC instruction

Operations

6.4.3.2 Sequential hit

When the read command that is targeted at a sequential address is received after execution of the read commands is completed, the read command transmits the Read requested data to the host system continuing read-ahead without newly allocating the buffer for read.

1)When the sequential read command is received, HAP is set in the sequential address of the last read command, and DAP is set at a present read position as it is.

	HAP (host address pointer)

Cache valid data		Read requested data		Free space
		Read-ahead da	ta

DAP (disk address pointer)

2)During reading of read requested data, the request data that has already been read is sent to the host system.

HAP (host address pointer)

Cache valid data	Read requested data	Free space

DAP (disk address pointer)

3)When reading of read requested data is completed and transfer of the read requested data to the host system is completed, the read-ahead operation continues until a certain amount of data is stored.

HAP (host address pointer)

Cache valid data	Read requested data	Read-ahead	Free
Cache valid data	Read requested data	data	space

DAP (disk address pointer)

4) The following cache valid data is for the read command that is executed next:

Cache valid data

LAST LBA START LBA

6-16

C141-E258

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 MHW2060AC, MHW2040AC manual Sequential hit

Models: MHW2060AC MHW2040AC

6.4.3.2 Sequential hit

MHW2060AC, MHW2040AC specifications