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Disk Drive Spin Up Sequence

At power on, the LS module will perform its internal start up initialization routine. Then the LS module will assert the disk drive START_1 and START_2 motor start signals low for disk drive slots 7 through 13, which will spin up the first 7 disk drives immediately. The LS module will then assert the disk drive START_2 motor start signal low and leave the START_1 motor start signal high for disk drive slots 0 through 6 which will command the second seven disk drives to spin up after a delay of 12 seconds times the modulo 8 value of the numeric SEL_ID of the disk drive.

Once the enclosure is powered up and all 14 drives are spun up as depicted above, the enclosure will support immediate drive spin up with two power supplies present.

Modulo 8

The drive spin up sequence above uses modulo 8 to calculate the spin up delay. Modulo 8 is determined by:

(SHELF ID x DRIVE NUMBER)/8 = NUMBER + REMAINDER

It is the REMAINDER value that is used for the calculation as it is always between 0 and 7 (hence modulo 8). The drive spin up time can then be calculated as follows:

REMAINDER x MODE PAGE SETTING = SPIN UP DELAY (Seconds)

EXAMPLE: A typical Mode Page Setting is 12, so if the Remainder = 7, the Spin Up Delay would be 7 x 12, or 84 seconds.

Disk Drive Spin Up Sequence

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Adaptec MAN-FC2002-001 manual Disk Drive Spin Up Sequence, Modulo
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MAN-FC2002-001 specifications

The Adaptec MAN-FC2002-001 is a high-performance storage controller designed to address the needs of enterprise-level data management. This Fibre Channel host bus adapter (HBA) is engineered to facilitate fast and reliable data transfer between servers and storage devices, thereby enhancing overall storage performance. One of its standout features is the support for 2 Gbps Fibre Channel technology, which enables rapid communication in environments where speed is critical.

This controller is equipped with dual-channel architecture that provides advanced connectivity options. This design not only improves bandwidth utilization but also allows for simultaneous access to multiple storage devices, enhancing system efficiency. With its robust architecture, the MAN-FC2002-001 supports both point-to-point and switched fabric connectivity, giving users flexibility in their configurations based on their unique storage environment.

One of the key technologies incorporated in the Adaptec MAN-FC2002-001 is its advanced error checking and correction capabilities. These features help protect data integrity during transmission, minimizing data loss risks. Additionally, the HBA supports an array of operating systems, including various UNIX distributions and Windows servers, making it a versatile choice for diverse IT infrastructures.

Performance-wise, the controller is optimized for high I/O operations, making it suitable for demanding applications such as databases, virtualization, and large file transfers. With support for advanced queuing techniques, it can efficiently manage a high volume of data requests, thus reducing latency and enhancing response times.

In terms of compatibility, the Adaptec MAN-FC2002-001 easily integrates with external storage arrays, providing users with options to scale their storage solutions as needed. The card is designed for both backward compatibility with older Fibre Channel infrastructures and forward compatibility with the latest technologies, thereby extending the investment value for enterprises.

To complement its technical capabilities, the MAN-FC2002-001 features a comprehensive set of management tools, allowing system administrators to monitor performance metrics, manage firmware updates, and configure settings easily. Its reliable design and robust performance characteristics make the Adaptec MAN-FC2002-001 an ideal choice for organizations looking to enhance their storage network infrastructure while maintaining high availability and reliability. Overall, the Adaptec MAN-FC2002-001 represents a powerful solution for modern data storage challenges.
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