6.3 Operation Check

6.3Operation Check

6.3.1Initial seek operation check

If an error is detected during initialization by the initial seek operation check routine at power-on, the spindle motor of the disk drive stops, and then the disk drive becomes unusable.

For an explanation of the operation check before the initial seek, refer to the Section 5.4.

6.3.2Operation test

While the host computer is processing data, the HDD monitors disk drive operation including data processing, command processing, and seek operations. If the HDD detects an error, the HDD posts the error to the initiator. The initiator then posts the error to the user.

The user may detect an intermittent or nonfatal error such as abnormal noise, abnormal odor, or very slow operation.

An error posted in an operation test must be investigated. Replace the disk drive to see whether the error was caused by the disk drive.

Often, errors posted in an operation test may be caused by the host system. Possible causes include insufficient power capacity, loose cable connection, insufficient timing or insufficient mechanical play, and problems related to other systems.

If an operation error is detected by the error detection circuit of the disk drive, an interrupt occurs. The interrupt is posted to the MCU on the PCA. The MCU stops the currently processed command, and causes the CHECK CONDITION status to post the error to the initiator.

When receiving the CHECK CONDITION status, the initiator issues a REQUEST SENSE command to collect detailed information about the error. The initiator then issues a REZERO UNIT command to return the read/write head to track 00. In normal processing, the HDD itself or initiator determines how to handle the error (processing retry or stop).

To analyze the error posted in the operation test, reconstruct the conditions in which the error occurred. Then, start troubleshooting the whole host system by replacing the disk drive.

6.3.3Diagnostic test

The diagnostic test is executed to find a faulty subassembly in a faulty disk drive, or to check disk drive performance. This test is usually a combination of specific disk drive functions or group of functions. This test may be executed using a different host computers or test equipment and away from the environment where the error first occurred.

To analyze the error posted in the diagnostic test, reconstruct the conditions in which the error occurred. Then, look for a possibly faulty subassembly or part of the disk drive.

The procedures to be used in this test depend largely on the type of test equipment used, and are not covered by this manual.

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Fujitsu MAW3073fc, MAW3300FC, MAW3147FC Operation Check Initial seek operation check, Operation test, Diagnostic test
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MAW3073fc, MAW3147FC, MAW3300FC specifications

The Fujitsu MAW3073fc, MAW3300FC, and MAW3147FC are high-performance Fibre Channel hard disk drives that cater to enterprise storage solutions. Designed for demanding applications, these drives are engineered to deliver reliability, speed, and capacity, making them suitable for data centers and other high-availability environments.

The MAW3073fc offers a storage capacity of 73GB and operates at 15,000 RPM, ensuring rapid data access and high throughput. This drive features advanced error correction capabilities, enhancing data integrity while minimizing downtime. The MAW3073fc supports the Fibre Channel interface, enabling fast data transfer rates that are essential for high-performance computing scenarios.

Following this, the MAW3300FC steps up the game with a larger capacity of 300GB, also spinning at 15,000 RPM. It boasts enhanced reliability features, including improved thermal management and vibration tolerance, which significantly reduce wear and tear and prolong the drives' lifespan. Its hot-swappable design allows for easy maintenance, making it an ideal choice for critical applications that require minimal disruptions.

The MAW3147FC further expands the offering with a storage capacity of 147GB. Designed for applications that require a balance between performance and capacity, this drive provides a reliable solution for enterprise environments. Like its counterparts, it operates at 15,000 RPM, ensuring swift data retrieval and consistency under heavy loads. The MAW3147FC also implements sophisticated caching algorithms that optimize read and write performance.

All three drives utilize SCSI command sets and feature RAID support, making them compatible with various enterprise storage systems. These drives are built with enterprise-grade components, ensuring durability and reliability, crucial in mission-critical setups. The combination of high RPM speeds, reliability features, and large capacities makes the Fujitsu MAW series an excellent choice for organizations looking to enhance their storage infrastructure.

In terms of technologies, these drives use advanced servo technology and tight mechanical tolerances to achieve high precision and performance. Moreover, they are designed to operate in environments with rigorous temperature and humidity controls, further enhancing their reliability. The MAW series exemplifies Fujitsu's commitment to providing high-quality, performance-driven storage solutions for modern enterprise needs.
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