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Fujitsu MAN3184, MAN3367, MAN3735 Error recovery processing procedures 5, Error logging

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

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Table 5.4

Error recovery processing procedures (5 of 5)

 

 

 

 

Recovery

 

 

Recovery processing procedure

method

 

 

 

 

 

 

 

 

26

1)

Issue the LOG SENSE command and read the "Current" values of the LOG SELECT

 

 

parameters.

 

 

2)

Search for any parameter values which exceed the threshold value or have reached the

 

 

maximum value, then issue the LOG SELECT command from the INIT and perform

 

 

resetting.

 

 

3)

Reissue the original command.

 

 

 

27

1)

Issue the INQUIRY command and read the operation mode information.

 

2)

If the parameter values are appropriate, reissue the original command.

 

Note This error could also be caused by a UNIT ATTENTION condition being generated,

 

 

caused by a programming error of another INIT, so when the values in the parameters

 

 

read in ( are illegal, recovery method 2 should be performed, or the operations of the

 

 

other INITs should be confirmed.

 

 

 

 

5.2.3Error logging

In order to collect information that is effective in maintenance, it is desirable for the INIT to accumulate (log) error information related to the SCSI bus which it has detected itself (BUS FREE error, command completion wait time-out, etc.) and error information reported by the IDD.

By specifying "1" in the PER bit in the "Read/Write Error Recovery parameter (Page 1) and the "Verify Error Recovery parameter (Page 7) of the MODE SELECT or MODE SELECT EXTENDED command, the INIT can know of the occurrence of errors which were recovered from successfully by the IDD's internal error recovery processing and their contents. By logging that error information, the INIT can obtain data for more detailed analysis of the disk drive's operating condition.

Concerning the contents of the error log, it is recommended that the data have a time stamp affixed so that they can be edited in a time series of the times the errors were detected, and that they include the following information.

ξThe source which issued the command and the SCSI ID of the SCSI device which was the target of the command.

ξThe CDB which was issued.

ξThe receiving status, or, when the status was that the command could not be received, the code showing the type of error detected by the INIT and its content.

ξAll bytes reported by the IDD.

C141-E124-01EN

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Fujitsu MAN3184, MAN3367, MAN3735 specifications Error recovery processing procedures 5, Error logging
Page 281 Page 283

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.