Seagate 6450, 6451 manual PIO and DMA Data-Transfer Modes, Upper 5 bits

Models: 6451 6450

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Medalist Pro 6450/6451 Product Manual, Rev. B

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3.2.2.1 PIO and DMA Data-Transfer Modes

You can set the multiword DMA mode and identify the PIO data-transfer mechanism and transfer mode with the Set Features command. To set the multiword DMA mode:

1.Write Set Features command value 03H (Set Data Transfer mode) to the Features register.

2.Write a transfer types value to the Sector Count register. The upper 5 bits of this value define the type of data transfer, and the lower 3 bits encode the mode value. This changes word 63 of the Identify Drive command to the value you enter in the Sector Count register.

The following table identifies allowable transfer types values:

Data-Transfer Mechanism

Transfer Types value

 

 

 

 

Mechanism name

Mode

Data

Lower 3 bits

value

Upper 5 bits

PIO Transfer Mode (default)

2

00000

000

PIO Transfer Mode: Disable

2

00000

001

IORDY Set PIO Mode = 2

 

 

 

PIO Flow Control Transfer

0

00001

000

Mode: Set PIO Mode = 0

 

 

 

PIO Flow Control Transfer

1

00001

001

Mode: Set PIO Mode = 1

 

 

 

PIO Flow Control Transfer

2

00001

010

Mode: Set PIO Mode = 2

 

 

 

PIO Flow Control Transfer

3

00001

011

Mode: Set PIO Mode = 3

 

 

 

PIO Flow Control Transfer

4

00001

100

Mode: Set PIO Mode = 4)

 

 

 

Obsolete

 

00010

nnn

 

 

 

 

Multiword DMA Mode

0

00100

000

 

 

 

 

Multiword DMA Mode

1

00100

001

Multiword DMA Mode

2

00100

010

Synchronous DMA Mode

 

01000

nnn

 

 

 

 

Reserved

10000

nnn

 

 

 

 

Note. If the drive does not support a commanded mode, it returns a 04 aborted command error.

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Seagate 6450, 6451 manual PIO and DMA Data-Transfer Modes, Upper 5 bits

6451, 6450 specifications

The Seagate 6450 and 6451 series represent a significant advancement in storage technology, designed specifically for high-performance computing demands. With an emphasis on reliability and speed, these models cater to enterprise-level applications, making them an ideal choice for data centers and organizations that require robust storage solutions.

One of the standout features of the Seagate 6450 and 6451 is their capacity. Both models provide extensive storage options, ranging from several terabytes to accommodate large data sets. This capability ensures that organizations can store vast amounts of information without the need for frequent upgrades, a crucial aspect for businesses that experience exponential data growth.

In terms of performance, the Seagate 6450 and 6451 series are built on cutting-edge SATA and SAS interfaces, providing exceptional data transfer speeds. This rapid throughput is essential for applications that require quick access to stored data, such as databases, virtualized environments, and enterprise applications. The drives offer improved IOPS (input/output operations per second), which enhances overall system responsiveness.

Reliability is another hallmark of the Seagate 6450 and 6451 series. With advanced error detection and correction technologies, these drives ensure data integrity, minimizing the risk of data loss. The series is also designed to operate continuously in high-demand environments, featuring robust construction and durability that meet the rigorous standards expected in enterprise settings.

Moreover, the energy efficiency of the Seagate 6450 and 6451 drives is noteworthy. They incorporate technologies that help reduce power consumption while maintaining performance. This is particularly important for organizations looking to reduce their carbon footprint and operational costs.

Additional features include comprehensive data security measures, such as built-in encryption support, which protects sensitive information from unauthorized access. These drives also come equipped with various management tools that facilitate monitoring and optimization of performance, making it easier for IT administrators to maintain their storage systems.

In summary, the Seagate 6450 and 6451 series are engineered to meet the evolving needs of the data-driven world. With impressive storage capacities, high-speed performance, steadfast reliability, and energy efficiency, they are invaluable assets for any enterprise aiming to maximize their data management capabilities.