Types of Hard Drive Damage

Rate this item
(0 votes)

b2ap3_thumbnail_iStock_000002566431XSmall.jpgIn our data recovery practice we have faced a variety of hard drive problems. So, in this article we tried to put together the information about different types of HDD damage.

Often, the reason lies in the damage of circuit board or reading heads. In this case data can be accessed only by an expert who will replace faulty component with a working one. If the procedure is without implications, after repair you will have access to 100% of your data.

It is much more difficult to recover data if a read/write head touches magnetic platter of a hard drive. It happens when a hard drive is subjected to shock since the distance between the head and platters in modern devices is minimal. In its turn, damage of magnetized surface virtually always implies loss of bits stored there. Head can touch the bad surface many times and each time breaking the platter’s fragments. These fragment can stuck inside and scratch hard drive’s surface and cause other troubles. A user will not be able to solve this problem because a head won’t be able to fly over the bad spot.

Overvoltage of read/write head could lead to irreversible damage of areas containing data. Magnetized hard drive will also lead to irreversible loss. Speaking of which, it is not only deleted bits but a mechanical destruction of memory sectors. Sometimes recovery specialists are able to recover data partially (all depends upon a specific hard drive). At the same time troublesome Hitachi drives usually are not subject to recovery: the reason behind it is that the manufacturer prefers not to tell about built-in in it software. Other brands at least provide a possibility to read data from the rest of platters.

Strange and yet a fact: the reason for problems may be even an internal disbalance. Uneven rotation of hard drive platters due to defect bearings will lead to undesirable changes in tracks and the system won’t know about it. As a result we get a data mishmash.

As a rule, bearings or spindle motor failure occurs due to errors during movement or transportation of a hard drive. Experts often get access to data by restoring the balance (by shifting and centring platters).

Logic errors do not require works to be done in a clean room environment. Usually they occur due to mishandling or deleting files against a backdrop of adequate performance of a hard drive.

Even though the source of problems hides in hard drive, probably it is only an ordinary bad sector. Such sectors can be found on all drives: main list contains bad sectors detected at the factory and auxiliary list is being replenished during the device operation — as long as sectors fail. Such divergence occurs quite often and pass for normal, but if the self-diagnostics system S.M.A.R.T. advises to re-save data ASAP, things look blue. Usually it indicates that auxiliary list is full and the number of bad sectors has exceeded the average value.

Now lets talk about irreversible damages. If a drive got in fire or was impacted by another heat source with magnetic material heated up above Curie point, the device will be completely demagnetized. A specific Curie point depends on a hard drive model. In magneto-optic devices the Curie temperature is default (laser heating) but things are different with hard disk drives.

An attempt to solve the problem yourself can make things worse — this is what make the data recovery process so difficult. According to statistics Europeans try to right the ship themselves more often than Americans do. After a number of failed attempts to recover data independently the device is brought to our company and data recovery becomes more complicated and sometimes even not possible. We have already published a number of articles on how to handle a hard drive if it contains important data.

Another reason for complications — employees tend to hide the fact that something is wrong with the device from the boss. We had a case when instead of a damaged hard drive we received a CD-ROM :)

Data Recovery Expert

Viktor S., Ph.D. (Electrical/Computer Engineering), was hired by DataRecoup, the international data recovery corporation, in 2012. Promoted to Engineering Senior Manager in 2010 and then to his current position, as C.I.O. of DataRecoup, in 2014. Responsible for the management of critical, high-priority RAID data recovery cases and the application of his expert, comprehensive knowledge in database data retrieval. He is also responsible for planning and implementing SEO/SEM and other internet-based marketing strategies. Currently, Viktor S., Ph.D., is focusing on the further development and expansion of DataRecoup’s major internet marketing campaign for their already successful proprietary software application “Data Recovery for Windows” (an application which he developed).

19 comments

  • Comment Link Jill Tuesday, 24 October 2017 02:21 posted by Jill

    It's hard to find experienced people on this subject, however, you sound like
    you know what you're talking about! Thanks

  • Comment Link Ashely Monday, 23 October 2017 15:39 posted by Ashely

    When I originally commented I clicked the "Notify me when new comments are added" checkbox and
    now each time a comment is added I get three emails with the same comment.
    Is there any way you can remove me from that service?
    Thank you!

  • Comment Link Wilson Saturday, 21 October 2017 03:08 posted by Wilson

    An impressive share! I've just forwarded this onto a coworker who had been doing a little research on this.
    And he in fact bought me lunch due to the fact that I discovered it for him...
    lol. So allow me to reword this.... Thanks for the meal!!
    But yeah, thanks for spending time to talk about this issue here on your
    internet site.

  • Comment Link Joseph Friday, 20 October 2017 22:12 posted by Joseph

    magnificent points altogether, you simply gained a new reader.
    What could you suggest about your put up that you simply made some days ago?

    Any positive?

  • Comment Link Todd Thursday, 19 October 2017 23:08 posted by Todd

    Thanks for ones marvelous posting! I quite enjoyed reading it,
    you will be a great author. I will remember to bookmark your
    blog and may come back very soon. I want to encourage that
    you continue your great work, have a nice morning!

  • Comment Link Janis Thursday, 19 October 2017 02:11 posted by Janis

    I do agree with all the ideas you've presented in your post.
    They're very convincing and can certainly work.
    Still, the posts are very brief for beginners.
    May just you please lengthen them a little from subsequent time?
    Thank you for the post.

  • Comment Link Vance Friday, 13 October 2017 15:09 posted by Vance

    Wonderful beat ! I wish to apprentice even as you amend your website,
    how could i subscribe for a blog site? The account helped
    me a appropriate deal. I had been tiny bit
    familiar of this your broadcast offered shiny transparent idea

  • Comment Link Christen Wednesday, 11 October 2017 07:11 posted by Christen

    wonderful put up, very informative. I'm wondering why the other
    specialists of this sector don't understand this.
    You must proceed your writing. I'm sure, you've a huge readers'
    base already!

  • Comment Link Marty Tuesday, 10 October 2017 09:12 posted by Marty

    Post writing is also a excitement, if you be familiar with after that you can write otherwise it is complex to write.

  • Comment Link Mason Sunday, 08 October 2017 19:48 posted by Mason

    Hey, I think your blog might be having browser compatibility issues.
    When I look at your blog in Ie, it looks fine but when opening in Internet Explorer, it has some overlapping.

    I just wanted to give you a quick heads up! Other then that, very good blog!

Leave a comment

Make sure you enter the (*) required information where indicated. HTML code is not allowed.