5.2 Logical Interface

-Bit 1: Track 0 Not Found (TK0NF). This bit indicates that track 0 was not found during RECALIBRATE command execution.

-Bit 0: Address Mark Not Found (AMNF). This bit indicates that the SB Not Found error occurred.

[Diagnostic code]

X’01’: No Error Detected.

X’02’: HDC Diagnostic Error

X’03’: Data Buffer Diagnostic Error.

X’04’: Memory Diagnostic Error.

X’05’: Reading the system area is abnormal.

X’06’: Calibration is abnormal.

X’80’: Device 1 (slave device) Failed.

Error register of the master device is valid under two devices (master and slave) configuration. If the slave device fails, the master device posts X’80’ OR (the diagnostic code) with its own status (X’01’ to X’06’).

However, when the host system selects the slave device, the diagnostic code of the slave device is posted.

(3) Features register (X’1F1’)

The Features register provides specific feature to a command. For instance, it is used with SET FEATURES command to enable or disable caching.

(4) Sector Count register (X’1F2’)

The Sector Count register indicates the number of sectors of data to be transferred in a read or write operation between the host system and the device. When the value in this register is X’00’, the sector count is 256. With the EXT system command, the sector count is 65536 when value of this register is X'00' in the first setting and X'00' in the second setting.

When this register indicates X’00’ at the completion of the command execution, this indicates that the command is completed successfully. If the command is not completed successfully, this register indicates the number of sectors to be transferred to complete the request from the host system. That is, this register indicates the number of remaining sectors that the data has not been transferred due to the error.

The contents of this register have other definition for the following commands;

INITIALIZE DEVICE PARAMETERS, SET FEATURES, IDLE, STANDBY and SET MULTIPLE MODE.

C141-E221

5-9

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Fujitsu MHV2060AS, MHV2080AS, MHV2040AS manual Features register X’1F1’, Sector Count register X’1F2’
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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.

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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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