3.4 Maintenance, Diagnostic Commands

 

Type of Self-diagnosis Test

UnotOfl = “0”

UnitOfl = “1”

 

 

 

1) Controller Function Test

⋅

⋅

 

 

 

 

2)

Disk Drive Seek Test

 

⋅

 

 

 

 

3)

Disk Media (CE Space) Write/Read/Data Comparison Test

 

⋅

 

 

 

 

⋅ : Execution Object

When the IDD completes all the specified self-diagnosis tests normally, it reports a GOOD status. On the other hand, when an error is detected in any of the specified self-diagnosis tests, a CHECK CONDITION status is reported and information related to the detected error is shown in the sense data. For example, when an error is detected in the controller function test, the type of error is shown by HARDWARE ERROR [=4] in the sense key, and the sense code/sub-sense codes show “Diagnostic failure on component ‘nn’ [=40-nn].” (nn is the code in the range X ‘80’ to X ‘FF,’ which shows the type of error. This code is a Fujitsu unique definition for the purpose of analysis when there is a failure, and its meaning is not released to the public. The user should present the value displayed in this sense data as repair information to the Fujitsu representative.)

Furthermore, error recovery processing when diagnostic tests (seek tests and write/read/data comparison tests) related to the disk drive are executed are in accordance with the mode set in the MODE SELECT command’s parameters (Page code 1: Read/Write Error Recovery parameter, Page code 21: Additional Error Recovery parameter), except in the following special cases.

Special cases of MODE SELECT parameters during a self-diagnosis test are as shown below

•The AWRE, ARRE and TB flags are not applied.

•The PER and DTE flags are as shown in Table 3.6.

 

Table 3.6

Error recovery control flags during the self-diagnosis test

 

 

 

 

PER

DTE

 

Diagnostic test operation

 

 

 

0

0

The diagnostic test continues when error recovery is successful. The contents of

 

 

recovered errors are not reported. When an error which cannot be recovered from is

 

 

detected, the diagnostic test terminates at that point with an error.

 

 

 

 

0

1

 

– – – – – (Setting prohibited) – – – –

 

 

 

1

0

The diagnostic test continues when error recovery is successful. When an error

 

 

which cannot be recovered from is detected, the diagnostic test terminates at that

 

 

point with an error. Even when all the detected errors have been recovered, a

 

 

CHECK CONDITION status (RECOVERED ERROR [=1]) is reported after the

 

 

series of diagnostic tests is completed and the sense data show the contents of the

 

 

last error to be successfully recovered from.

 

 

 

1

1

When error recovery is successful, or even when error recovery is impossible, the

 

 

diagnostic test is terminated with an error at the point when the permitted error

 

 

recovery processing is completed and a CHECK CONDITION status is reported.

 

 

The sense data show the contents of the detected error.

 

 

 

 

C141-E167

3 - 93

Page 154 Page 156
Page 155
Image 155
Fujitsu MAP3367 Maintenance, Diagnostic Commands, Error recovery control flags during the self-diagnosis test, Per Dte
Page 154 Page 156

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.
Top Page Image Contents