Fujitsu MHS2030AT, MHS2040AT, MHS2020AT, MHS2060AT manual Operation Confirmation, Operation test

1.2 Operation Confirmation			Maintenance and Diagnosis
		Table 1.1 Status register contents
Status bit		Contents
BIT0=1	Shown in Table 1.2
BIT1, 2	Normal.
BIT3=1	(1)	Check whether vibration is transmitted because of the way the disk drive
BIT4=1		is mounted.
BIT5=1	(2)	Check the power, cable, and connector.
BIT6=0	(3)	If it is concluded that the disk drive is the cause, replace the disk drive.
BIT7=1

		Table 1.2 Disposition for error register contents
Error bit		Method of disposition
BIT0	If it is concluded that the disk drive is the cause, replace the drive.
BIT1
BIT4
BIT6
BIT2	(1)	Check the status of the host, cable, and drive.
BIT7	(2)	If it is concluded that the disk drive is the cause, replace the drive.

1.2Operation Confirmation

1.2.1 Operation test

When the host computer is processing data, the disk drive monitors disk drive operation errors including data, command, and seek errors. The host is notified of the error that the disk drive detected and the user is notified of its result.

The user may notice intermittent and indefinite failures such as overlong execution time, abnormal noise, abnormal odor, or failures in particular processes.

The failure reported in the operation test will need further investigation. To ascertain the cause of the disk drive failure reported, the disk drive can be replaced. Failures in the operation test are often not caused by the host system. For example, not having enough power supply reserve, a loose cable connection, no timing and mechanical reserves, or relationship with other systems.

In normal operation, the disk drive itself or the host determines the processing (return or halt) following the detected failure state.

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