(2)Reserve right and third party reserve function

If the "3rd Pty" bit in byte 1 of the CDB is "0," the IDD is reserved by the INIT which issued this command and that INIT has the Reserve right for the IDD.

If the "3rd Pty" bit is "1," the third party reserve function is specified. An INIT which specifies the third party reserve function and issues this command can reserve the IDD for use by another SCSI device. In this case, this command reserves the IDD for the SCSI device (called the third party device) with the SCSI ID specified in the "3rd Pty Dev ID" field in byte 1 of the CDB. Even if the IDD is reserved for another SCSI device using the third party reserve function the reserve right for that ID resides with the INIT that issued this command. Therefore, in order to release that reserve state, it is necessary for the INIT that issued this command to issue a RELEASE command (shown in Section 3.1.13) with the third party release function specified. Also, the conditions for maintaining the reserve state established by the third party reserve function are the same as in the case where the third party reserve function is not used. (See item (1).)

Please note that since only 3 bits are defined for the "3rd Pty Dev ID" field, this command is valid for the third party reserve function with respect to only SCSI devices with SCSI ID 7 to 0.

(3)Changing the reserve conditions (Superseding Reserve)

The INIT which has the reserve right for an IDD (the INIT which has issued this command in the past and has established the IDD reserve state) can change the IDD's reserve conditions by issuing a another RESERVE command (Superseding Reserve).

When a superseding reserve is executed, the IDD releases the reserve state it was in up to that point and establishes a new reserve state in accordance with the specifications in this newly issued command.

By using this function, the INIT can, for example, change the SCSI device (SCSI ID) for which the logical unit is reserved while continuing the reserve state of the logical unit with which the reserve state was established using the previous third party reserve function.

3 - 44

C141-E124-01EN

Page 108 Page 110
Page 109
Image 109
Fujitsu MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES specifications
Page 108 Page 110

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.
Top Page Image Contents