Troubleshooting steps for hard disk problems

① first checks to see if Cmossetup has lost the hard drive configuration information. Measurement of the motherboard on the Comsram circuit for battery failure, or components (such as diodes, transistors, resistors, capacitors, etc.) damage can cause and the CMOS hard disk configuration parameters error.

② through the electric self-test, if the screen display error message "1701" or "Harddiskerror", indicating that the hard drive is indeed faulty. However, it may be that the hard drive adapter is not plugged in, or the hard drive is plugged into the hard drive adapter, or the hard drive adaptor is faulty.

③ shutdown, take apart the cover, test +5v, +12v power supply is normal, power box fan is rotating. In order to determine whether the external circuit is short of electricity.

④ check signal cable, Plug and hard disk adapter card is plugged in, there is no plug or bad contact. Try swapping some cable plugs to try.

⑤ uses the "substitution method" to determine the faulty part. Get a good one. Hard disk adapter card (or multi-function card) compared with the hard disk adapter card, the problem is whether the hard disk adapter or the hard drive itself.

⑥ observe the stepper motor end of the stall pin is stuck to die, such as die, hand back to the starting position.

The above steps, users need to carefully check, test, analysis, find out the bad components for repair, or replace the hard disk adapter card.

After the above treatment, as long as it is not the hard disk body itself damage, only the general connectors of contact or external circuit failure most can quickly eliminate.

② Measuring Resistance method

The measuring method is usually to measure the internal resistance of components or components with the resistor of the multimeter, and analyze the fault reason in the circuit according to the size of the resistance or the breaking condition. General components or components of the input pin and the output pin to the ground or to the power supply have a certain internal resistance, with a common multimeter measurement, there are many situations will appear positive pumping resistance small, large reverse resistance. The general positive resistance is about a few ohms to 100 ohms, and the reverse resistance is more than hundreds of ohms. But the forward resistance is never equal to 0 or nearly 0, the reverse resistance will not be infinite, otherwise you should suspect that the pin has a short-circuit or open circuit. When it is determined that the failure of the hard disk subsystem is on a board or a few chips, the resistance method can be used to find it. Power off the shutdown, and then measure the device or board of the break, open circuit, resistance size, etc., in order to determine the point of failure. If the DC resistance of the stepper motor winding of the hard disk is 24 euro, the nominal value is normal, 10 euro is a local short circuit, and 0 euro or several European windings are destroyed.

The flat cable signal line of hard drive is commonly used to measure with the method of breaking. The power cord of the hard disk can be disconnected from the single measurement and can be measured on the ground, if the infinity is a circuit breaker, or if the resistance is less than 10 euro, you should suspect partial

1, hard disk failure analysis and processing steps only briefly introduce the analysis of physical failure and general processing steps: Short circuit, need to do further inspection.

③ method of measuring voltage

The method is to measure the voltage of the ground between the pins of a part or component by means of a multimeter, and compare it with a political party voltage value of a logical diagram or other reference point. If the difference between the voltage value and the normal reference value is large, the Frog component or component is faulty, if the voltage is normal, the part is intact and can be transferred to the test of other parts or components.

The general hard disk power supply and floppy disk insertion line, the four threads are +12v, +5v, -5v and ground respectively. The hard drive stepper motor rated voltage is +12v. Hard drive when the current is large, when the power supply is poor (voltage from 12V to 10.5V), will cause instability or start-up difficulties.

The power supply voltage on the Ⅰ/O channel System board expansion slot is +12v, -12v, +5v and -5v. On-board signal voltage high level should be greater than 2.5V, low level should be less than 0.5V. Hard drive plugs, sockets in accordance with the pins are arranged in a voltmeter, high level between the 2.5-3.0v. If the high level output is less than 3V, the low level output is greater than 0.6V is the fault level. The logic is that the thumping measurement can be measured by a test-wave device or calculated using a logical pen.

④ Measuring Current method

If there is a local short-circuit phenomenon, the short-circuit element will heat up and may cause fuse fuse. The multimeter is strung into the fault line to check if the current is above normal. The short circuit on the adapter card of the hard drive will cause the system to increase the load current, the drive motor short circuit or the drive short circuit will cause the host power failure. The working current of the hard disk power supply +12v should be about 1.1A. When the hard drive load current increases, it will cause the hard drive to boot when the bad. Motor short-circuit or load over the flow of light insurance fuse, heavy will lead to power blocks, switch adjustment tube damage. The current loop can be measured by a series of pseudo load. If there is an insurance line, you can disconnect the safety pipe from one end to measure the table. The power cord of a chip on the printing board can be used as a cutter or a steel saw blade to cut the copper wire string into the multimeter measurement. Motor plug, power plug can be from the card in the power cord from the string into the table measurement.

The meaning of a hard drive failure prompt information

(1) Dateerror (data error)

There are unrecoverable errors in data read from floppy disks or hard disks, bad sectors and bad file allocation tables on the disk.

(2) Harddiskconfigurationerror (hard drive Configuration error)

The hard drive is improperly configured, the jumper is incorrect, and the hard drive parameter is set incorrectly.

(3) Harddiskcontrollerfailure (hard drive controller failure)

Controller card (multi-function card) loose, wrong connection, hard drive parameter settings are not correct.

(4) Harddiskfailure (hard drive failure)

Controller card (multi-function card) failure, hard drive configuration incorrect, jumper wrong, hard disk physical failure.

(5) Harddiskdrivereadfailure (hard drive read disabled)

Controller card (multi-function card) loose, hard disk configuration is incorrect, hard disk parameters set incorrectly, hard disk record data destruction.

(6) nobootdeviceavailable (no boot device)

The system cannot find a floppy disk or a hard drive that is the boot device.

(7) Nobootsectoronharddiskdrive (no boot sector on hard drive)

The boot sector on the hard drive is missing, infected with a virus, or incorrect configuration parameters.

(8) Nonsystemdiskordiskerror (non-system disk or disk error)

The disk as the boot disk is not a system disk, does not contain system boot and core files, or the disk itself fails.

(9) Sectornotfound (sector not found)

The system disk cannot locate a given sector on a floppy disk or a hard disk.

(10) Seekerror (search error)

The system cannot locate a given sector, track, or head on a floppy disk or a hard disk.

(11) resetfailed (hard drive reset failed)

The circuit failure of the hard disk or hard drive interface.

(12) Fatalerrorbadharddisk (hard drive fatal error)

Hard drive or hard drive interface failure.

(13) noharddiskinstalled (no hard drive installed)

The hard drive is not installed, but the hard drive is set in the CMOS parameter.

The hard drive letter is not connected, the hard drive card (multi-function card) is not plugged in properly.

Hard drive or hard drive card failure.

Two hard drive failure code See table

Code code meaning

1700 Hard drive System pass (normal)

1701 hard drive systems that are not recognized

1702 hard disk Operation timeout

1703 Hard Drive selection failed

1704 Hard Drive controller failed

1705 The record you are looking for is not found

1706 Write operation failed

1707-way signal error.

1708 Head Selection Signal error

1709ECC Inspection Error

Sector buffer overflow when 1710 reads data

1711 Bad address sign

1712 Unrecognized error

1713 Data comparison Error

1780 hard drive C failure

1781D disk Failure

1782 Hard Drive Controller error

1790C Disk Test Error

1791D Disk Test Error