Table 6.2

System-level field troubleshooting

 

 

 

Item

 

Recommended work

 

 

DC power cable

Check that the power cable is correctly connected to the disk drive and

 

power supply unit.

 

 

DC power level

Check that the DC voltage is within the specified range (±5%).

 

 

 

Check that the +5 VDC value (pins 3 and 4 of the power connector) is

 

4.75 to 5.25 VDC.

 

 

 

Check that the +12 VDC supply (pins 1 and 2 of the power connector of

 

disk drive) is 11.4 to 12.6 VDC.

 

 

Electrical noise

Make sure the maximum ripple peak-to-peak value of +5 VDC is within

 

250 mV and +12 VDC is within 250 mV.

 

 

 

Make sure the high frequency noise (over 20 MHz) is less than 100 mVp-p.

 

 

Interface cable connection

Check that the SCSI interface cable is correctly connected between the disk

 

drive and controller.

 

 

Terminating resistors

For a daisy chain connection, check the terminating resistor on the last disk

 

drive only. For a star-burst connection, check that the terminating resistor

 

is correctly mounted on all disk drives.

 

 

Drive selection address

Check that the disk SCSI ID is set correctly.

 

 

Plug setup

Check that the jumpers on the PCA are set so that the disk drive and host

 

computer operate normally. See Section 5.3.

 

 

System cables

Check that all system cables are connected correctly.

 

 

System diagnostic test

When possible, execute the system level diagnostic routine as explained in

 

the host computer manual. This gives a detailed report of a possible fault.

 

 

Intermittent or nonfatal errors

Check the AC voltage from the power supply. Check the DC voltage level

 

at the power connector for the disk drive.

 

 

 

If the AC voltage level is abnormal or there is a lot of electrical noise,

 

notify the user of the error.

 

 

 

If the DC voltage level is unstable, replace the power supply unit.

 

 

 

If possible, replace the disk drive. If replacing the disk drive does not

 

eliminate the error, the removed disk drive is probably not faulty. To

 

continue error analysis, refer to the hardware and software manuals

 

supplied with the system.

 

 

 

6-14

C141-E166

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Fujitsu MAP3735NC/NP, MAP3147NC/NP, MAP3735NP, MAP3367NC/NP, MAP3367NP manual System-level field troubleshooting
Page 109 Page 111

MAP3735NP, MAP3367NC, MAP3735NC/NP, MAP3367NC/NP, MAP3147NC/NP specifications

Fujitsu's MAP3147NC/NP, MAP3367NC/NP, and MAP3735NC/NP hard disk drives represent a robust solution for businesses seeking reliable data storage options. These models are part of Fujitsu’s extensive line of high-performance hard drives that cater to various organizational needs, from servers to high-capacity data storage systems.

One of the standout features of these hard drives is their speed. The MAP3147NC/NP operates at a spindle speed of 10,000 RPM, ensuring rapid data access and retrieval. This speed is essential for environments requiring quick data transactions, making it suitable for enterprise-level databases and high-performance computing applications.

The capacity range across these models is designed to meet varying storage requirements. The MAP3147NC offers 147 GB, while the MAP3367NC provides 67 GB, and the MAP3735NC boasts a generous capacity of 35 GB. This diversity allows organizations to select the drive that best fits their data storage and performance needs while maintaining a scalable storage solution.

In terms of technology, the drives incorporate advanced features such as Serial Attached SCSI (SAS) interface, which enhances data throughput and reliability compared to traditional Parallel SCSI interfaces. SAS technology enables these drives to support multiple device connections while ensuring high-performance throughput, essential for modern enterprise environments.

The drives employ a 64 MB cache, providing a significant performance boost by allowing for quicker access to frequently used data. This capability improves overall system responsiveness, especially in applications requiring high input/output operations per second (IOPS).

Moreover, the MAP3147NC/NP, MAP3367NC/NP, and MAP3735NC/NP series are designed with data integrity in mind. They include features such as Error Correction Code (ECC) and background error scanning, which work together to maintain the integrity of stored data and minimize the risk of data loss.

In conclusion, Fujitsu’s MAP3147NC/NP, MAP3367NC/NP, and MAP3735NC/NP hard disk drives provide a blend of performance, capacity, and reliability. With their fast spindle speeds, robust data throughput via SAS technology, and enhanced cache memory, these drives are ideal for enterprises requiring durable and efficient data storage solutions in high-demand environments. As organization needs evolve, these drives offer scalability and reliability to support diverse applications and workloads.
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