Interface

(36) SET MAX (X’F9’)

 

SET MAX features register values

 

 

 

Value

 

Command

 

 

 

00h

 

Obsolete

 

 

 

01h

 

SET MAX SET PASSWORD

 

 

 

02h

 

SET MAX LOCK

 

 

 

03h

 

SET MAX UNLOCK

 

 

 

04h

 

SET MAX FREEZE LOCK

 

 

 

05h - FFh

 

Reserved

 

 

 

•SET MAX ADDRESS

A successful READ NATIVE MAX ADDRESS command shall immediately precede a SET MAX ADDRESS command.

This command allows the maximum address accessible by the user to be set in LBA or CHS mode. Upon receipt of the command, the device sets the BSY bit and saves the maximum address specified in the DH, CH, CL and SN registers. Then, it clears BSY and generates an interrupt.

The new address information set by this command is reflected in Words 1, 54, 57, 58, 60 and 61 of IDENTIFY DEVICE information. If an attempt is made to perform a read or write operation for an address beyond the new address space, an ID Not Found error will result.

When SC register bit 0, VV (Value Volatile), is 1, the value set by this command is held even after power on and the occurrence of a hard reset. When the VV bit is 0, the value set by this command becomes invalid when the power is turned on or a hard reset occurs, and the maximum address returns to the value most lately set when VV bit = 1. (The value by VV bit = 0 is held in case that this command with VV bit = 1 has not been issued or had set the default value, and hard reset occurs.)

After power on and the occurrence of a hard reset, the host can issue this command only once when VV bit = 1. If this command with VV bit = 1 is issued twice or more, any command following the first time will result in an Aborted Command error.

When the SET MAX ADDRESS EXT command is executed, all SET MAX ADRESS commands are aborted. The address value returns to the origin when the SET MAX ADDRESS EXT command is executed using the address value returned by the READ NATIVE MAX ADDRESS command.

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Fujitsu MHV2080AS, MHV2060AS, MHV2040AS manual SET MAX X’F9’, SET MAX Address
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MHV2060AS, MHV2080AS, MHV2040AS specifications

Fujitsu's MHV series of hard disk drives, specifically the MHV2040AS, MHV2080AS, and MHV2060AS models, are designed to deliver efficient performance and reliability for a range of applications, particularly in desktop computing and entry-level servers. Each of these drives adheres to the Serial ATA (SATA) interface, which ensures compatibility across a wide range of systems and is known for its cost-effectiveness and simplicity.

The MHV2040AS features a storage capacity of 40GB, making it suitable for basic computing tasks including document editing, web browsing, and media playback. The MHV2060AS steps it up with a 60GB capacity, allowing for increased data storage needs while still maintaining a high level of performance. The largest of the trio, the MHV2080AS, offers an impressive 80GB of space, positioning it well for users who require additional room for applications, games, and multimedia files.

All drives in this series are equipped with a rotational speed of 5400 RPM, which strikes a balance between speed and power consumption. This speed is adequate for everyday tasks and allows for quick boot times and file access, making them ideal for home and small office environments. Additionally, the drives feature an average latency of 5.5 milliseconds, contributing to their overall performance in retrieving data.

In terms of technology, the MHV series employs a fluid dynamic bearing (FDB) motor, which not only enhances reliability but also reduces noise levels during operation. The FDB technology helps improve the longevity of the drives by minimizing wear on mechanical components. This characteristic is particularly important for users seeking quieter drives, especially in work environments that require minimal disruption.

The drives also incorporate advanced power management features that significantly reduce power consumption, making them an environmentally friendly choice for users mindful of their carbon footprint. These drives are equipped with energy-saving modes that optimize their performance when not in full use, ensuring lower operational costs and longer lifespan.

Overall, the Fujitsu MHV2040AS, MHV2080AS, and MHV2060AS hard drives provide a solid solution for users looking for dependable storage with a range of capacities to fit their needs. Their performance, combined with noise reduction technologies and energy efficiency, makes them a notable choice for various computing environments, from single-user desktops to small business applications.
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