“Mode Bit”

3

2

1

0

Transfer Mode

 

 

 

 

 

 

 

0

0

0

0

Header + Data, without Address Specification

 

 

 

 

 

 

 

0

0

0

1

Header + Data, with Address Specification

 

 

 

 

 

 

 

0

0

1

0

Data Only, with Address Specification

 

 

 

 

 

 

 

0

1

0

0

Microcode Download, without Saving

 

 

 

 

 

 

 

0

1

0

1

Microcode Download, with Saving

 

 

 

 

 

 

 

0

1

1

0

Microcode Download with offset, without Saving

 

 

 

 

 

 

 

0

1

1

1

Microcode Download with offset, and Saving

 

1

0

1

0

Echo buffer

 

 

 

 

 

 

(1)Mode = 0, 0, 0, 0: Header + data, without address specification

In this mode, a 4-byte header (with all zero’s specified for the contents) must be added to the top of the data transferred from the INIT. Also, zero must be specified in the “Buffer address” field of the CDB.

The “Transfer byte length” field specifies the total number of bytes of data transferred form the INIT. The transfer byte count specification includes the 4 bytes of the header. The IDD stores the data transferred from the INIT with the header omitted (“Transfer byte length” – 4 bytes) in the data buffer beginning in order from the top of the data buffer (Address: X ‘000000’).

Furthermore, a value which is less than the [IDD’s buffer size + 4 bytes] must be specified in the “Transfer byte length” field in the CDB. When a value that is larger than this is specified, no data transfer with the INIT is executed. Also, when zero is specified in the “Transfer byte length” field, this command is terminated without data being transferred.

Figure 3.24 shows the format of data transferred from the INIT when this mode is specified.

Header

Data

 

Byte

Bit

 

7

6

5

 

4

3

 

2

1

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

0

0

0

0

0

 

0

0

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

0

0

0

0

0

 

0

0

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

0

0

0

0

0

 

0

0

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

 

0

0

0

0

0

 

0

0

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

Buffer Data (Byte 0)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

Buffer Data (Byte 1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

~

 

~

 

 

 

 

 

 

 

 

 

 

~

 

~

 

~

 

 

 

 

 

 

 

 

 

 

~

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

n

 

 

 

 

 

 

Buffer Data (Byte n–4)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 3.24 WRITE BUFFER command: buffer data (Mode = 000, 001)

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Image 184
Fujitsu MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES specifications Write Buffer command buffer data Mode = 000

MAN3735, MAN3184, MAN3367, MAN3735 SERIES DISK DRIVES, MAN3367, MAN3184 specifications

Fujitsu's MAN3184, MAN3367, and MAN3735 series disk drives represent a significant advancement in storage technology, catering to the needs of businesses seeking reliability, performance, and high capacity. These drives are designed for enterprise environments, providing exceptional data integrity and speed essential for effective data management.

The MAN3184 series is renowned for its high rotational speed of 10,000 RPM, which significantly enhances data access times. With a capacity of up to 18.4 GB, these drives are suitable for applications requiring quick read and write operations. The series employs an improved read/write head technology, which reduces latency and increases overall performance. This technology is complemented by advanced error correction mechanisms, ensuring the reliability necessary for critical data applications.

Transitioning to the MAN3367 series, these drives offer increased storage capacity and improved performance metrics. With capacities reaching up to 36.7 GB, they cater to growing data demands in modern enterprises. They also feature a 10,000 RPM spindle speed, ensuring that the drives can handle intensive workloads with ease. The MAN3367 drives include SCSI interface support, making them versatile and easy to integrate into various systems. The inclusion of intelligent caching algorithms allows for faster data retrieval, while built-in thermal management features ensure optimal performance, even under heavy usage.

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In summary, Fujitsu's MAN3184, MAN3367, and MAN3735 series disk drives deliver a blend of high capacity, performance, and reliability. These drives incorporate advanced technologies that address the evolving needs of enterprise storage solutions, making them a valuable asset for any organization aiming to enhance their data management capabilities.