Manuals / Fujitsu / Computer Equipment / Computer Drive

Fujitsu MAP3735, MAP3367, MAP3147, MAS3735 Reassign Block command defect data list configuration

Models: MAP3735 MAP3147 MAS3367 MAP3367 MAS3735

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Command Specifications

Note:

Copying of the contents of data in the logical data blocks specified in the “Defect data” list to alternate blocks allocated by this command is attempted, but in some cases, copying cannot be done. Confirmation of the contents of the data in allocated alternate blocks, saving of data before issuing this command and restoring of data after this command is executed are the responsibility of the INIT.

The format of the “Defect Data” list transferred from the INIT by this command is shown in Figure 3.16.

Header

Defect

Descriptor

List

 

 

Bit

 

7

6

5

4

 

3

 

2

 

1

0

 

 

 

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

X‘00’

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

X‘00’

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

Defect List Length (m) (MSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

Defect List Length (m)

(LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

Defective Block Logical Block Address (MSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

Defective Block Logical Block Address

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

Defective Block Logical Block Address

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

Defective Block Logical Block Address (LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

~

~

 

~

 

Defective Block Logical Block Address

 

~

 

~

 

 

 

~

n+3

Figure 3.16 REASSIGN BLOCK command: defect data list configuration

The “Defect data” list is configured from a 4-byte header and one or more defect descriptors which follow it. One defect descriptor has a length of 4 bytes.

The “Defect list length” field in the header indicates the total number of bytes (m) of the defect descriptor list transferred after the header, and must be a multiple of 4. Also, when zero is specified in this field, this command is terminated without transfer of the defect descriptor list and allocation processing of alternate blocks.

Note:

The Defect list length that can be specified for the IDD is 2,044 (X ‘7FC’) bytes or less. Therefore, a maximum of 511 defective blocks can be specified in the REASSIGN BLOCKS command.

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Fujitsu MAP3735, MAP3367, MAP3147, MAS3735, MAS3367 specifications Reassign Block command defect data list configuration
Page 147 Page 149

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.