Hard Disk

Hard disk failures are the most common computer hardware problems. And laptop hard disks fail more often than desktop HDs. If you knock hard or drop your laptop even a few inches while it’s working, you may damage the HD.


  • The laptop starts as usual but when Windows starts to load it goes to blue screen with either “UNMOUNTABLE_BOOT_VOLUME”, “hal.dll is missing or corrupt” or “WINDOWS\SYSTEM32\CONFIG\SYSTEM” (or similar) is missing or corrupt. All these error messages indicate a filesystem problem. Sometimes it can be fixed by just scanning the HD for errors. However in over 50% of the cases these errors indicate that the HD is starting to go bad and is probably developing bad sectors.
  • The laptop starts as usual but Windows freezes on the initial “Windows XP” screen, although the blue bar continues to move, and you can hear feint but continuous clicking. Hard disk have to be replaced.
  • As soon as the laptop is started there are loud clicks or grinding sounds and Windows doesn’t load. Hard disk have to be replaced.
  • Shortly after starting the laptop a message appears (usually on a black screen) “SMART test failed. Backup your data immediately and replace the hard disk” or similar. Well, that says it all. S.M.A.R.T. is a self-test that is build into the hard disk.

In almost all cases the laptop can be started from a “live” bootable CD and everything works normal. In rare cases the HDs PCB (printed circuit board) may short or even burn. Then the laptop wouldn’t start unless the HD is removed.


The first case from above (corrupted filesystem) is by far the most common. There are several ways of diagnosing and fixing the corrupted/missing files. If this was just a software problem, the hard disk will continue to work properly. However keep in mind that this may also be a signs of deterioration and backup daily!

Also the hard disk will need some preventive maintenance. Check it for errors every few days or at least every week. To do that you must be logged in an admin account, then right-click the “C” drive in “My Computer”, select “Properties”, then “Tools”, then click on the “Check Now” button. Select both boxes and click on “Start”. Windows will tell you that the hard disk cannot be checked now but you can schedule a check for the next restart. Click “OK” and restart the laptop. The check will take from about 30-40 min. to over 2 hours, so do it when you’re not planning to use the laptop for some time.

145 thoughts on “Hard Disk”

  1. When i m starting my laptop then showing me this massage

    Windows boot manager
    Info:an unexpected i\o error has occurred

    Plsss help me now what can I do

  2. my external hard drive may have bad sectors as computer slows down when it is connected to computer. The repair center charges quite high to repair it. What’s your suggestion?

  3. Hello. Hard drive/disk problems? Buy a new hard drive. Usually around $45.

    Read my guide for Dell laptops:

    1. Find your service tag located on the bottom of your laptop. Then, go to: http://www.dell.com/support/home/us/en/04

    2. Type in your tag. (7 characters. Example: 4yg2dv1)

    3. After typing in your tag, it’ll tell you what kind of laptop you have. Type in this on any web browser: Hard Drive/Hard Disc (Example: Dell Inspiron ####)
    (***Google is recommended***)

    4. After typing that in, there should be hard drives on that specific laptop. Buy a hard drive/hard disk. Usually $45. Make sure it’s the right hard drive/hard disk. Don’t get the wrong one!

    5. After purchasing it, take your laptop apart and replace the hard drive. Search that up on YouTube. (***Recommended Search: replacing hard drive***)

    Or, go to a Tech store and let them do the work… Most hard disks are around $45. But, them taking it apart for you would maybe cost more money.

    Sorry for the sucky guide!


    1. i have loptop HP 2000 Whenever I Try To boot it on my laptop screen will displayed “boot device not found” what should i do to make my laptop boot on?

  5. when i turn on my laptop after it starts it shows that windows detected a hard disk problem in the following volumes
    Which disk is failing?
    The following hard disks are reporting failure:
    Disk Name: ST320LM001 HN-M320MBB ATA Device
    Volume: C:\;D:\;E:\
    and it says to back up the files

  6. I accidentally poured water on my lenovo N500 and the thing just wouldn’t start up. I repaired it and it worked nut it just wouldn’t load a recognised hard disk . I tried formatting the hard disk on another PC But it just wouldn’t format. pls what do I do?pls mail me the reply

  7. My laptop HP doesn’t start properly showing diaglog box,”automatically repairing….”. What is the problem and how can I solve?

  8. when i switch on laptop it shows,failure predicted on hard disk0: TOSIBHA5056gsy
    immediately back up your data and replace your hard disk drive. a failure may be imminent.
    press F1 to continue

  9. i’am trying to fix my pc it has boss. I have used CHkdsk C: / F / r / x after it finished it said failed to transfer logged messages to the event log with status 50 can u help me please

  10. My HP printer 2515 deskjet ink advantage is not working recently. I stay in 6Park lane. Police housing estate, Officers qtr no 1. Ground floor northern block. If it is possible to send technician to my home than it would be so convienent because i have small baby only in my home. If it not possible than can U provide me the nearest service centre address/phone number from my home.

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