Sense Data Error Recovery Methods

 

 

Table 5.4

Error recovery processing procedures (4 of 5)

 

 

 

 

Recovery

 

 

Recovery processing procedure

method

 

 

 

 

 

 

 

 

18

1)

Issue the MODE SENSE or MODE SENSE EXTENDED command and confirm the

 

 

values of the disk media data format related parameters (Block descriptor, Page 3:

 

 

Format parameters, Page 4: Drive parameters).

 

2)

If the parameter values are correct, issue the FORMAT UNIT command and initialize

 

 

the entire disk media surface. (Note)

 

3)

If the parameter values are not correct, issue a MODE SELECT or MODE SELECT

 

 

EXTENDED command and reset the necessary parameters, then reinitialize the entire

 

 

disk media surface by the FORMAT UNIT command. (Note)

 

Note In a system where multiple INITs are connected together, an error may have been

 

 

reported due to a MODE SELECT or MODE SELECT EXTENDED command, or a

 

 

FORMAT UNIT command issued by another INIT, so before executing this recovery

 

 

method, it is necessary to confirm the operations of the other INITs.

 

 

19

Initialize the entire disk media surface. It is desirable at this time to increase the number of

 

spare sectors as much as possible. If this error occurs repeatedly, it is necessary to perform

 

alternate block allocation processing through the system (shown in Chapter 6) or reconfirm

 

the use conditions of the disk drive, such as the installation environment.

 

 

 

20

1)

Reissue the original command (Retry).

 

2)

If it doesn't recover after 10 retries, perform recovery method 13.

 

 

 

21

1)

Issue the MODE SENSE or MODE SENSE EXTENDED command and read the

 

 

"Current" values in the MODE SELECT parameters.

 

2)

If the parameters' 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.

 

 

22

Reissue the original command (Retry).

 

 

 

23

1)

If it is necessary to reestablish rotational synchronization, issue the MODE SELECT or

 

 

MODE SELECT EXTENDED command (specify by Page 4, byte 17).

 

2)

Reissue the original command (Retry).

 

 

 

24

1)

Issue the READ or READ EXTENDED command and read the data for the block

 

 

where the error occurred.

 

2)

Investigate the cause of the data not matching and perform data recovery processing

 

 

from the INIT.

 

 

 

25

Reissue the original command (Retry). It is desirable at this time to confirm the operations

 

of the other INITs.

 

 

 

 

 

5 - 20

C141-E167

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Fujitsu MAS3367, MAP3367, MAP3147, MAS3735, MAP3735 specifications Error recovery processing procedures 4

MAP3735, MAP3147, MAS3367, MAP3367, MAS3735 specifications

Fujitsu, a renowned leader in technology and innovation, has developed a variety of reliable hard disk drives (HDDs) that cater to a wide range of data storage needs. Among these, the MAS3735, MAP3367, MAS3367, MAP3147, and MAP3735 series stand out for their advanced features and exceptional performance.

The MAS3735 is a high-capacity enterprise-class drive that boasts a storage capacity of up to 300 GB. Its 10,000 RPM spindle speed ensures rapid data retrieval and efficient performance, making it ideal for data-intensive applications. It utilizes a Serial Attach SCSI (SAS) interface, which allows for improved data transfer rates and increased reliability compared to traditional SATA drives. The drive is designed with advanced technologies such as error recovery and data integrity features, ensuring the safety and security of critical data.

Similarly, the MAP3367 and MAS3367 models are geared towards both enterprise and mid-range server environments, providing a storage capacity of up to 300 GB as well. These drives also operate at a spindle speed of 15,000 RPM, offering swift access times that enhance overall system performance. The MAP3367 employs the Ultra 320 SCSI interface, allowing for significant bandwidth and ensuring data is transmitted efficiently.

On the other hand, both MAP3147 and MAP3735 models provide versatile solutions for various applications, supporting capacities from 36 GB to 147 GB. The MAP3147, with its 10,000 RPM speed, is optimized for workloads requiring quick access and high throughput, making it suitable for transactional systems and enterprise applications. The MAP3735, while offering comparable capacity, emphasizes exceptional reliability and durability, which is crucial for environments that involve heavy data loads.

All these Fujitsu HDDs are characterized by their robust construction, reliability, and efficiency. They are built to withstand heavy workloads and are equipped with features like advanced thermal management and acoustic noise reduction, ensuring they operate effectively in data center environments.

In conclusion, Fujitsu's MAS3735, MAP3367, MAS3367, MAP3147, and MAP3735 series HDDs are designed for high performance and reliability, catering to both enterprise and mid-range environments. Their advanced features make them a strong choice for businesses looking to enhance their storage solutions while maintaining data integrity and system performance.