1.7.6Reset processing

The INIT can reset the SCSI bus with following.

ξRESET condition

ξTARGET RESET message

ξCLEAR TASK SET message

ξABORT TASK SET message

ξABORT TASK message

The RESET condition resets all the SCSI devices connected on the same SCSI bus. The IDD is initialized to the same state as when its power is switched on by the RESET condition, with the currently executed command as well as all the commands in the queue cleared.

The TARGET RESET message resets only specific SCSI device (TARG) selected by the INIT, and can initialize that TARG to the same state as when its power is switched on. However in a multi-initiator environment, caution concerning clearing of commands issued by other INITs is necessary.

The CLEAR TASK SET message clears all commands that the IDD is executing or queuing. The previously set environment and conditions, such as MODE SELECT parameters, are not changed.

An INIT which wants to clear only specific commands it has issued itself must use an ABORT TASK SET message or an ABORT TASK message. In this case, the INIT generates an ATTENTION condition at the desired point in time if that command is currently being executed on the SCSI bus, then sends the ABORT TASK SET message to the TARG. Also, if there is a disconnect in effect, after the INIT selects the TARG, an ABORT message, in the case of an untagged command, or an ABORT TASK message, in the case of a tagged command, is sent following an IDENTIFY message which specifies the object logical unit, or the INIT waits until a reconnection request occurs, then sends an ABORT TASK SET message or ABORT TASK message. In the case of an ABORT TASK SET message, only the commands issued previously in the logical unit specified at that time by the INIT that issues the ABORT TASK SET message (currently being executed or queuing) are cleared and there is no influence on the other commands.

When an ABORT TASK message is received, only the command issued to the logical unit specified at that time by the INIT which issued the ABORT TASK message is cleared, and there is no influence on the other commands. No status byte or TASK COMPLETE message concerning commands cleared in this processing is reported.

In particular, in the case of clearing of a write operation command for writing to the disk media which is currently being executed, the IDD stops processing of that command as shown in Table

1.6.The case of halting an overlapping command that is currently being executed (see Section 1.7.1) is the same. The INIT must determine the complete completion state and if necessary, must execute data recovery processing.

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Fujitsu MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES specifications Reset processing
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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.
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