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Fujitsu MHV2040AH, MHV2100AH, MHV2060AH, MHV2080AH manual Automatic alternating processing

Models: MHV2040AH MHV2080AH MHV2060AH MHV2100AH

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6.3 Defect Processing

(3) Automatic alternating processing

This technology assigns a defective sector to a spare sector of a spare cylinder for alternate assignment.

This device performs automatic alternating processing in the event of any of the following errors.

•

•

Automatic alternating processing is attempted for read error recovery by reaching the specified retry cycle while a read error retry is in progress.

Before attempting automatic alternating processing, writing and reading of already corrected data is repeated for the sector in which an error occurred. If a read error does not occur during this reading operation, automatic alternating processing is not performed.

If error recovery is not successful even if a write fault error retry is executed, automatic alternating processing is performed.

Figure 6.6 shows an example where automatic alternating processing is applied to sector (physical) 5 with cylinder 0 and head 0.

Sector (physical)

Cylinder 0

Head 0

Alternate cylinder 0

Head 0

Already assigned

779 780

Defec- tive sector

(Not used)

 

779

780

This is assigned to an unassigned sector.

Notes:

1.The alternate cylinder is assigned to an inner cylinder in each zone.

2.When an access request for sector 5 is issued, the sector assigned for alternating processing of the alternate cylinder must be accessed instead of physical sector 5.

If an access request for sectors after sector 5 is issued, seek is executed to cylinder 0, head 0 in order to continue processing.

Figure 6.6 Automatic alternating processing

C141-E217

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Fujitsu MHV2040AH, MHV2100AH, MHV2060AH, MHV2080AH manual Automatic alternating processing
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MHV2040AH, MHV2080AH, MHV2060AH, MHV2100AH specifications

The Fujitsu MHV series of hard disk drives, specifically the MHV2060AH, MHV2080AH, MHV2100AH, and MHV2040AH, are renowned for their reliability and performance in the mobile HDD segment. Designed primarily for use in laptops and other portable devices, these drives integrate cutting-edge technologies to meet the demands of today's data-intensive applications.

One of the hallmark features of the MHV series is its high data density, allowing for substantial storage capabilities in compact sizes. The MHV2060AH offers a storage capacity of 60 GB, while the MHV2080AH and MHV2100AH offer 80 GB and 100 GB respectively. The MHV2040AH provides a slightly more modest but still robust 40 GB of storage. This range of capacities ensures that users can select the model that best fits their storage needs.

The drives utilize the latest perpendicular magnetic recording (PMR) technology, which enhances recording efficiency and increases data storage densities. This technology significantly optimizes the use of disk surface area, providing better performance and more reliable data access. Additionally, the MHV series incorporates an advanced actuator system that ensures precision head positioning, enhancing data integrity and reducing error rates during read and write operations.

In terms of performance, the MHV series maintains a revolutions per minute (RPM) rating of 5400, which strikes a balance between speed and energy efficiency, making these drives suitable for low-power applications. The drives are also designed with a low acoustic level, generating minimal noise during operation—a crucial factor for mobile users who prefer quieter devices.

Furthermore, the Fujitsu MHV series features a robust shock resistance design, allowing them to withstand the rigors of mobile computing. This makes them suitable for use in portable environments subject to vibration and physical movement, thus ensuring data security and drive longevity.

Overall, the Fujitsu MHV2060AH, MHV2080AH, MHV2100AH, and MHV2040AH represent a formidable selection of mobile hard disk drives filled with advanced technologies and features, making them well-suited for a wide range of applications in today's fast-paced digital world. With their combination of storage capacity, performance, and durability, these drives continue to serve as reliable solutions for users seeking efficient data storage in portable formats.