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Fujitsu MAS3735, MAP3367, MAP3147, MAP3735 Format Unit command defect processing 3, Reassign Blocks

Models: MAP3735 MAP3147 MAS3367 MAP3367 MAS3735

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3.3 Format Commands

 

 

Table 3.5 FORMAT UNIT command defect processing (3 of 3)

Note 1)

ddd:

0,0,0= D List in the block address format.

 

 

1,0,0= D List in the byte distance from the index format.

 

 

1,0,1= D List in the physical sector address format.

Note 2)

The D List is not transferred from the INIT.

Note 3)

If the data block length is changed and the disk media is initialized, the INIT cannot specify a

 

combination defect processing method.

Note 4)

When this combination of defect processing methods is specified, the IDD performs verification

 

of the data blocks after initialization and creates the C List. In other combination defect

 

processing methods, the INIT can clearly specify whether the verification operation is prohibited

 

or permitted by the DCRT flag of the Format parameter.

3.3.2REASSIGN BLOCKS (07)

Bit

Byte

7

6

5

4

3

2

1

0

0

X‘07’

1

LUN

0

0

0

0

0

2

0

0

0

0

0

0

0

0

3

0

0

0

0

0

0

0

0

4

0

0

0

0

0

0

0

0

5

0

0

0

0

0

0

0

Link

This command allocates alternate data blocks for defective data blocks specified in the “Defect Data” list transferred form the INIT. See Chapter 3, “Product Specifications/Installation Procedures” in the Product Manual concerning alternate block processing methods implemented by this command.

The INIT specifies the logical block address of one or more defective data blocks in the “Defect Data” list which it transfers to the IDD. The IDD searches for unused spare sectors for use as alternate blocks and allocates these alternate blocks for the specified logical data blocks. Also, in the case of data blocks for which alternate data blocks have already been specified, the IDD allocates other usable spare sectors as alternate blocks for those data blocks.

Using this command, copying of the contents of the data in the logical data blocks specified in the “Defect data” list to the allocated alternate data blocks is attempted. If the data in logical data blocks which are specified in the “Defect data” list are correctable by ECC correction, the corrected data are copied and those data which are not correctable by ECC are copied as is in the uncorrected state (including the errors) and in the case of other media errors, X ‘00’ is copied in all bytes. Furthermore, the contents of data in data blocks other than the logical data blocks specified in the “Defect Data” list are not influenced by the alternate allocation processing through this command.

C141-E167

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Fujitsu MAS3735, MAP3367, MAP3147, MAP3735, MAS3367 specifications Format Unit command defect processing 3, Reassign Blocks
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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.