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Fujitsu MAN3735, MAN3367, MAN3184 specifications Illegal LUN specification, Reserved operation code

Models: MAN3735 MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES MAN3367 MAN3184

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1.7.2Illegal LUN specification

The logical unit number (LUN) supported by the IDD is LUN = 0 only. If a LUN other than this (1 to 7) is specified, the IDD performs one of the following operations, depending on the type of command issued at that time.

1)The INQUIRY command is executed normally even if the LUN specification is illegal. However, byte 0 of the “Standard INQUIRY Data” (“Qualifier” field and “Device Type Code” field) transferred to the INIT for that command indicates X ‘7F.’

2)The REQUEST SENSE command is executed normally even if the LUN specification is illegal. However, the sense data transferred to the INIT for that command indicates that the LUN specification is illegal (ILLEGAL REQUEST [=5]/Logical unit not supported [=25-00]).

3)If an illegal LUN is specified for a command other than the INQUIRY command or REQUEST SENSE command, that command is terminated abnormally with a CHECK CONDITION status. The sense data generated at this time indicate that the LUN specification is illegal (ILLEGAL REQUEST [=5] /Logical unit not supported [=25-00]).

1.7.3Reserved operation code

Group 7 command operation codes (X ‘E0’ to X ‘FF’) are reserved by Fujitsu. When any command is issued which includes these operation codes, the IDD does not always respond with a CHECK CONDITION status (ILLEGAL REQUEST [=5] / Invalid command operation code [=20- 00]. The INIT should not issue commands which contain these operation codes.

1.7.4Command processing in the not ready state

After the IDD’s power is switched on, the initial self-diagnosis is completed normally and the spindle motor reaches the normal rotational speed, “system information,” which includes such information as MODE SELECT parameters and disk media defect information is read from the system space on the disk drive and each type of control information is initialized. When this operation is completed, the IDD is in a state where it can be used (ready state). Furthermore, the not ready state is defined as the IDD being in either of the following states.

• When the spindle motor has not reached the normal rotational speed.

• When reading of system information is not completed, or reading failed.

Also, if initialization of the disk media (formatting) has not been completed normally, it will be impossible to access data on the disk media.

Processing of and response to commands received by the IDD when it is in the not ready state or in the initialization incomplete state are described below. Furthermore, starting control of the spindle motor when the power is switched on can be selected from either or two methods, through the setting terminal (motor start mode) on the IDD, with rotation started at the same time as when the power is switched on or through the START/STOP UNIT command.

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Fujitsu MAN3735, MAN3367 Illegal LUN specification, Reserved operation code, Command processing in the not ready state
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MAN3735, MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES, MAN3367, MAN3184 specifications

Fujitsu's MAN3184, MAN3367, and MAN3735 series disk drives represent a significant advancement in storage technology, catering to the needs of businesses seeking reliability, performance, and high capacity. These drives are designed for enterprise environments, providing exceptional data integrity and speed essential for effective data management.

The MAN3184 series is renowned for its high rotational speed of 10,000 RPM, which significantly enhances data access times. With a capacity of up to 18.4 GB, these drives are suitable for applications requiring quick read and write operations. The series employs an improved read/write head technology, which reduces latency and increases overall performance. This technology is complemented by advanced error correction mechanisms, ensuring the reliability necessary for critical data applications.

Transitioning to the MAN3367 series, these drives offer increased storage capacity and improved performance metrics. With capacities reaching up to 36.7 GB, they cater to growing data demands in modern enterprises. They also feature a 10,000 RPM spindle speed, ensuring that the drives can handle intensive workloads with ease. The MAN3367 drives include SCSI interface support, making them versatile and easy to integrate into various systems. The inclusion of intelligent caching algorithms allows for faster data retrieval, while built-in thermal management features ensure optimal performance, even under heavy usage.

The MAN3735 series takes performance up another notch, boasting higher capacities of up to 73.5 GB. These drives are particularly suited for environments that require high reliability and availability. The series utilizes a state-of-the-art SCSI Ultra160 interface, which maximizes data transfer rates, ultimately enhancing overall system efficiency. Additionally, the MAN3735 series employs advanced data protection technologies, including power loss protection and predictive failure analysis, which proactively minimizes potential downtime.

All these series of Fujitsu disk drives are built with a focus on durability and sustained performance. They are designed to operate seamlessly in high-demand environments, ensuring that organizations can rely on them for critical applications. Their compact design and energy-efficient operation make them an ideal choice for modern data centers looking to optimize space and reduce power consumption.

In summary, Fujitsu's MAN3184, MAN3367, and MAN3735 series disk drives deliver a blend of high capacity, performance, and reliability. These drives incorporate advanced technologies that address the evolving needs of enterprise storage solutions, making them a valuable asset for any organization aiming to enhance their data management capabilities.