Why did my 500GB partition vanish and how do I get it back?

Hafiz Luqman August 15, 2012

My Acer Aspire 7745G has 1000GB HD. I had 2 x 500GB Partitions. A couple of days ago one of my partitions vanished. I can’t see it in “My Computer” or Disk Manager. I only see my Windows 7 475GB main C: drive. I don’t see free space in disk manager either, just 475GB and recovery drive, even though my HD is 1000GB.

What’s going on?

  1. Albert Eines
    August 23, 2012 at 9:27 am

    If the partitions in the hard disk get accidentally deleted, formatted or damaged, Windows operating system can corrupt causing huge data loss in the system. Users may face data inaccessibility problem due to corruption in the OS. At such case, Windows recovery is a must. I would suggest you to download the following tool and try it http://www.restorepartition.org/

  2. Oron
    August 16, 2012 at 3:39 pm

    The advice given by others covers all the main points I have to make, but if it's definitely a case of a lost partition (rather than a drive), then I can recommend you use a specialised recovery tool such as "MiniTool Partition Recovery" or "Easeus Partition Recovery".

  3. Anay Chaubal
    August 16, 2012 at 7:22 am

    right click on my computer, then click manage,
    find an item on the left called as disk management. Do you see a partition in there which says about 500 gb, raw? then that is your partition, and was lost. rt click on it, and delete, then create and format a new partition. Your data will of course be lost from that partition, but using a free data recovery tool as suggested in the other comment will help you recover the data to another partition.

    Also, I have to ask this: did you play around with a linux installation disk / live disk or any thing else which might affect the partitions on your hard drive?

  4. GrrGrrr
    August 15, 2012 at 12:46 pm

    for your model Acer Aspire 7745G i checked the specification and found that it has only 1HDD of 500GB.

    Download, install FREE EaseUS Partition Master Home from below and re-check your HDD.

  5. ha14
    August 15, 2012 at 7:58 am

    see if Partition Find And Mount can detect the lost partition

  6. ferdinan Sitohang
    August 15, 2012 at 1:30 am

    Are you upgrade the package of your laptop into 1 Tb? I try to find the specification for your laptop, and it come with 500 Gb. As I know, even one partition not visible in my computer, but in disk manager, it will be visible. If it is was like you said i assume that it is a different HD, first is your current HD in laptop and others is your external drive. There is no possibility that one HD that is broken half of it still running well.

  7. Bruce Epper
    August 15, 2012 at 1:15 am

    Are you sure they were two separate partitions on the same drive and not 2 separate 500GB hard drives each with a single partition. If this was the case, one of the drives could have died producing the results you have noted. Most of the configurations I could find indicated it ships with either one or two 500GB drives, not a single 1TB drive.

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