Command Specifications

If the IDD performs rounding processing ("rounding up" or "rounding down") of parameter values specified by the INIT, in some cases a "CHECK CONDITION" status (RECOVERED ERROR [=1]

/Rounded parameter [37-00]) is reported, and in some cases it is not reported. Whether or not a "CHECK CONDITION" status is reported is determined by the type of "rounding up" or "rounding down" and the conditions.

If the INIT would like to confirm that the IDD is implementing rounding processing, it issues a MODE SENSE or MODE SENSE EXTENDED command after issuing this command and reads the values for the "Current" parameters, then compares them with the parameter values sent in the MODE SELECT command.

Parameter fields which are the object of rounding processing are explained in the descriptions of each page descriptor in this item.

Figure 3.8 shows the data configuration of the parameter list transferred by the INIT in this command. The parameter list is configured from header 4 bytes in length followed by a block descriptor with a length of 8 bytes. This is followed by one or more page descriptors, or, when there is no block descriptor the 4-byte header is followed by one or more page descriptors. The INIT may transfer a header only, or the header and block descriptor only without the page descriptor added.

Header

 

Bit

7

6

5

 

4

 

3

 

2

1

0

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

X‘00’

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

X‘00’ (Media Type)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

⋅

0

0

 

⋅

 

0

 

0

0

0

 

 

 

 

 

 

 

 

 

3

 

 

 

X‘00’ or X‘08’ (Product Descriptor Length)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Block Descriptor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Bit

7

6

5

 

4

 

3

 

2

1

0

Byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

Data Block Count (MSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

Data Block Count

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

 

 

Data Block Count

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

 

 

Data Block Count (LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

X‘00’

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

Data Block Length (MSB)

 

 

 

 

 

 

 

 

 

 

 

 

6

 

 

 

 

Data Block Length

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

Data Block Length (LSB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3 - 22

C141-E167

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Image 84
Fujitsu MAS3367, MAP3367, MAP3147, MAS3735, MAP3735 specifications Header, Block Descriptor
Page 83 Page 85

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.
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