Fujitsu MAN3367, MAN3735, MAN3184 specifications Data Access Commands Read, Lun

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

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3.2Data Access Commands

3.2.1READ (08)

Bit

7

6

5

 

4

 

3

 

2

1

0

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

X‘08’

 

 

 

 

 

 

 

 

 

 

 

 

1

 

LUN

 

 

 

 

Logical Block Address (MSB)

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

Logical Block Address

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

Logical Block Address (LSB)

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

Transfer Block Count

 

 

 

 

 

 

 

 

 

 

 

 

 

5

0

0

0

0

0

 

0

Flag

Link

 

 

 

 

 

 

 

 

 

 

 

 

This command reads the number of blocks of data in continuous logical data blocks specified in the "Transfer block count" field with the logical data block on the disk media specified in the "Logical block address" field in the CDB as the top.

The transfer block count can be specified up to a maximum of 256 logical data blocks. When zero is specified in the "Transfer block count" field in byte 4 of the CDB, it specifies transfer of 256 logical data blocks and when a value other than zero is specified, it specifies the number of logical data blocks that should be transferred.

When transfer of multiple data blocks is instructed by this command, when the data blocks which are to be processed come to a track boundary, cylinder boundary or zone boundary, a head switch or cylinder switch is executed automatically and reading of the specified number of blocks is performed.

When the specifications in the "Logical block address" field and "Transfer block count" field in the CDB exceed the maximum logical block address in the IDD, that command is terminated with a CHECK CONDITION status (ILLEGAL REQUEST [=5] / Logical block address out of range [=21-00]) and the reading of data from the disk media is not executed.

Error recovery processing during execution of this command can be specified by the MODE SELECT parameter. If retry processing and data correction processing are not prohibited, when this command is completed normally, or when it is completed with a "RECOVERED ERROR [=1]" sense key report, the data transferred to the INIT by this command are error free. When a correctable error check is detected, the IDD first corrects the data errors in the data buffer, then transfers those data to the INIT.

When disconnect processing is permitted, the starting timing for reconnection processing in order to execute data transfer on the SCSI bus can be specified by the MODE SELECT parameter (buffer full ratio). Also, if the Look-Ahead cache feature is permitted, a caching operation is performed using the IDD's data buffer by this command. See Chapter 2, "Data Buffer Management," concerning details of data buffer operation and the Look-Ahead cache feature.

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Fujitsu MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES specifications Data Access Commands Read, Lun

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.