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ADRC Data Recovery Tool FAQ

Check our Frequently Asked Questions to get a quick answer to the most common inquiries.

The FAQ page features selected solutions for users' reference by the PenZoft technical support
team.
 
 

What causes data loss?

What are the chances of getting back my data?


What is data recovery?

After inadvertantly deleting some important data, can I continue to use the computer system
before I get it recovered?


Can I run scandisk or chkdsk to fix the problem if the system freezes?

Are there any DIY tricks that may help?

 
     
  What causes data loss?

There are many factors that contribute to data loss. Natural disaster, computer virus, data
corruption, computer crime, physical impact/damage or human errors are examples that may
result in the data loss. Typically, one or more of the following symptom may appear:

BIOS cannot not detect the hard disk drive.

"Operating system not found" error.

Power surges result in "no disk drive found" error.

Strange clicking or grinding noises from hard disk drive.

Abnormal spinning action of the disk drive.

Missing folders or files without reason.

Accidental deletion, format or fdisk.

Natural disasters or accident involving fire, water or crash.
 
     
  What are the chances of getting back my data?

If you have not been fiddling with the data media which may cause further damage after failure,
it is almost definite than we can get back the data for you.
 
     
  What is data recovery?

It is the resecue process of retrieving lost or inaccessible data from physically or logically
damaged data media by skilled data recovery professionals. The media could be hard drives,
backup tapes, CD media, Compact flash cards, floppy diskettes or any other types of digital
media where a possible data loss situation exists and normal modes of accessing the data are no
longer possible.

 
   
  After inadvertantly deleting some important data, can I continue to use the
computer system before I get it recovered?


Not unless you want to run the risk of losing the deleted data. Once the deleted data is deleted,
the data space (containing your deleted data) will be marked deleted but the contents is still
intact. This data will be finally "blanket" over by new data. If you continue to use the computer
system, you could be creating new data which finally overwrites your old data.
 
     
  Can I run scandisk or chkdsk to fix the problem if the system freezes?

We advise not to. In most cases, running scandisk and chkdsk will stress the hard disk further if
the condition of failure is associated with hardware. Even if the disk is physically sound, running
such utilities may result in large number of orphan file fragments without its original names and
directory locations.
 
     
  Are there any DIY tricks that may help?

Some disks may not need data recovery service. Learn more about some simple do-it-yourself
data recovery and preliminary checking before you consider full-fledge data recovery service by
the professionals.

The followings are some generic "tricks" but could potentially damage your drive further. They
are meant for situations whereby there is no severe hardware failure and you know what you
are doing. You must be aware that by following such tricks, you could risk losing your data
forever. Please do not attempt any such homebrew recovery methods if your data is valuable.
In some cases, the more you attempt recovery on a failed drive, the more difficult it is for a
professional data recovery company to recover your data.

Verify that the jumpers, power cables, IDE (or SCSI) cables are firmly seated and are in good
conditions.

If the drive is not spinning (Neither do you feel any vibration, nor any spinning sound), try:
  1. Clean contacts between board and motor using anti-static cloth.
  2. Check that nothing (especially the casing) is short-circuiting the electronic board of the drive.
  3. swap the circuit board if you have exact match of the model and firmware. Please be very
    careful here. For certain disk models, swapping boards of different firmware will corrupt
    data and render the situation unrecoverable. In situation whereby there is a combination
    of board and R/W head failure, such action will further damage the platter. In case of
    doubt, do not try especially if the data is important to you
  4. Check for loose power cables. Measure the voltage to see 5V and 12V are present.
If the drive chirps and refuses to spin up, try to place the drive in a vertical position and tap
the drive firmly (without excessive force). This will only work if there is a slight Read-Write
head "stiction". If the situation is real "sticky", you probably need to send the disk to a data
recovery professional to avoid damaging the platter.

We hear one popular "cool trick" mentioned by some news group. They suggest putting the
disk into a freezer overnight. However, there is real danger that when you take up the drive,
water get condensed on the internal platter and this will cause imminent disk failure. We
advise against this.

Scan disk is something that you should usually avoid if you feel that this could be hardware
related failure. Scan disk will only fix minor logical corruption and when the number of bad
sectors is small and not too severe.


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