Windows 8 and 8.1 Forums


Lost Acer OEM Partition

  1. #1

    Lost Acer OEM Partition


    As you all may know I'm not the savviest of users. Long ago when using 7 early on I botched up trying to remove an Acer OEM partition to no avail only to be left missing roughly 65GBs of my hard drive and not being able to see the partition. Luckily I didn't destroy the HD!

    Thanks to this forum I found a nice little free utility that Brink introduced here: Partition - Recover Deleted Partitions in Windows that I ran and it was able to see the partition. Not only that partition, but a bunch of smaller ones. I couldn't believe my eyes when I came to look at this after it was finished scanning!

    I am asking for help to clean this mess up. Below is the results of the scan. The first one listed (no label) is my Windows 8 Pro partition. The one labled 8.1 is obviosly my 8.1 RP that I dual boot. The one with the checkmark with no label I'm guessing is the Acer partition. As you can see Windows Disk Management does not see any other partitions other than 8 and 8.1.

    If at all possible, what do I need to do to correct this? I'd like not to touch my 8 partition because of Office, but I will if I need to. 8.1 is just a preview. What are all those smaller ones? What does overlapped mean?

    Attachment 28529


    Attachment 28530

      My System SpecsSystem Spec

  2. #2


    Portsmouth Hants
    Posts : 772
    Windows 8.1 Pro with Media Center


    It looks like a mess, but it isn't really. It looks like your drive is, or thinks it is actually a 250GB ST250620AS with Guaranteed sectors 488,397,168. Your maximum sector count (LBA) is 488394750 which fits this nicely.

    I'd check out what is written on the disk drive label, and what was written on the specs for your Acer model when you bought it.

    Acer Aspire T690 Specs (Pentium D 935 3.2GHz, 1GB RAM, 250GB HDD, Vista Home Premium) - Desktops - CNET Reviews

    http://www.seagate.com/support/disc/...100402371a.pdf

    The usable size of a disk is less than the advertised capacity, because 300GB would be 300,000,000,000 Bytes according to the disk manufacturer.

    This is the decimal Gigabyte.

    Your operating system, NTFS uses the binary gibibyte or 1073741824 bytes

    The capacity of a 300GB disk would be 279,396,772,384, under NTFS, or about 93% of the rated capacity.

    The capacity of a 250GB disk would be 232,830,643,653, again about 93% of the rated capacity.

    You currently get 135.23 + 97.66 = 232.89, which is spot on with any rounding errors.

    So there is no lost space, and Disk Manager is not wrong. When you upgraded from Vista to 7, you gained the space from the OEM partition to approximately the maximum possible for your disk.

    Don't worry about the lost or overlapping partitions, they have nothing of value to you any more, they are just ghosts of systems past. Do label your volumes in the disk properties - it may resolve ambiguity when you may need it for future problems.





      My System SpecsSystem Spec

  3. #3


    Thanks for answering, fafhrd.

    I'm absolutely positive it is a 300GB Seagate ST3250820AS Barracuda HD, so therefore it's missing 65GBs or so.

    I don't remember the program I used to boot with to attempt to remove the partition. It was 6 or 7 years ago. Obviously I performed something wrong. When I opened C: properties my heart sank that I was missing 65GBs after that. I could never see the partition again. Eventually I gave up until I ran this utility. Not sure, but I don't recall if Disk Manager was never able to see this type of partition.

    I have minimum knowledge on the subject, but I understand that a drive will show a certain percentage due to MBR files and the like. What is the file called that describes the partition to "see type/manage/move/manipulate" it? For the life of me I can't seem to find it in researching.

    As requested, I won't worry about the lost or overlapping partitions. I understand that they were deleted but continue to be seen as ghosts. What I don't understand is why the labled W8.1 partition's listed status is "overlapped". What does that mean? It is also in a faded font like the rest of the "overlapped" "ghost" partitions are. Then the one I think is the lost Acer recovery partition is in regular font as all the rest of the Lost/Deleted "ghost" partitions. Why is it and what does the regular font mean?

    I relabled my C: drive as reqested. I posted the new Disk Management results.

    Is there any way to recover the 65GBs missing? Is it worth the effort? I,ve never had any trouble with the drive.

    Attachment 28541
      My System SpecsSystem Spec

  4. #4


    Quote Originally Posted by HippsieGypsie View Post
    Thanks for answering, fafhrd.

    I'm absolutely positive it is a 300GB Seagate ST3250820AS Barracuda HD, so therefore it's missing 65GBs or so.


    Newegg has that drive listed as 250 GB.

    newegg.com/Product/
      My System SpecsSystem Spec

  5. #5


    Yes, that particular model and number was manufactured with different GB sizes as so with some of their other models. I'm absolutely positive it is the 300GB model. I know what I bought and I used to see 300GBs in the drive's properties until I screwed it up.

    Is there any your hope in this or should I just write it off and move on? I've been thinking of getting a HDD for OSs and use the old drive for backup. I see the prices for HDDs continue to decline.
      My System SpecsSystem Spec

  6. #6


    Quote Originally Posted by HippsieGypsie View Post
    Yes, that particular model and number was manufactured with different GB sizes as so with some of their other models. I'm absolutely positive it is the 300GB model. I know what I bought and I used to see 300GBs in the drive's properties until I screwed it up.

    Is there any your hope in this or should I just write it off and move on? I've been thinking of getting a HDD for OSs and use the old drive for backup. I see the prices for HDDs continue to decline.
    I think you should just write it off and get a new HDD or SSD as the SSD would give you a boost in speed.
      My System SpecsSystem Spec

  7. #7


    Thanks, labeeman.

    What do you think, fafhrd?
      My System SpecsSystem Spec

  8. #8


    Portsmouth Hants
    Posts : 772
    Windows 8.1 Pro with Media Center


    I stick with what I said in post #2.

    Here's the thing in the drive name: ST3250820AS.

    Check the label on the drive itself, and make up your mind if you actually have a 300GB drive or really a 250GB drive as all other evidence indicates.

    Download SeaTools SeaTools for Windows | Seagate and check the drive out for SMART status and their short drive self test, and see if the drive is failing. I would guess it is generally OK, but a 7 year old drive may have some potentially weak areas.

    Run msinfo32.exe to see what System/Components/Storage/Disks tells you about your disk and partitions.

    I think you have lost nothing, and your disk is running at full capacity, and you, of course can add a SSD and another disk for even greater storage, but with your current needs do not merit this, having about only one quarter of each of your partitions used, and a total of 178GB of free space.

    I wish I had that much free space to play with!!
      My System SpecsSystem Spec

  9. #9


    Thanks for answering, fafhrd. It looks as though my memory didn't serve me right. It probably is a 250 gig drive as you stated. I will physically check the hard drive is you suggested.

    Lol! I realize the drive size was an overkill for me at the time, but nearing retirement it will serve me well. I plan on doing more partitioning to learn and play around with other OSs.

    Yes, The drive is getting older which is getting to be a concern. I was considering a new machine until I loaded 8RP then bought 8 OEM, which uses far less resources. It runs so much faster 7 did, so therefore I decided no new machine. I've never had a lick of trouble with this machine so far is hardware, save the shortage of RAM with Vista of which I upgraded to 2GBs max since then.

    Please allow me to ask you or anyone for further advice.

    I know it gets to be where we have to make a decision on whether or not to dump money into older machines. We don't want to chase good money after bad. In all things there's a risk. I'm thinking of taking a risk with this older Acer. I'll take the money saved and invest some into it. What are some thoughts on that?

    My old Buffalo exterior backup drive took a crap about 3 weeks ago due to a bad transformer. $20 to replace, but to me it isn't worth it. So what I'll do is get a new SSD as you and labeeman suggested to get better performance and use the Seagate drive for backup and other OSs if it checks out ok with the tools you suggested. I think it will be ok for that, but we know sooner or later that'll go bad. I'll just replace that with another SSD or get a good-sized thumb drive. Those are getting to be quite large, more reasonably priced, and are more convenient.

    Onboard graphics has always been the lowest WEI score. I've always considered a graphics card of which I have a slot for. I want to get another monitor, so the card will not only help with performance but also accommodate the monitor hookups. I think I can go with HDMI with the new, which is more efficient. Correct? It may even be a touch monitor. Haven't made that decision yet, although I'm leaning more towards it.

    There's a new version of BIOS that I could update to, but I'm not sure if it's worth it. What's yours or anyone's thoughts on that? If I go to upgrade that, I may as well change the CMOS battery as well. Yes?

    As I stated earlier, I upgraded RAM to 2GBs max. The processor is Intel dual core D series running at 3 gigahertz. This should be more than sufficient for 8.1 resource demands of which I'll upgrade to. Yes?

    The only thing I would lack in would be USB3 which has a higher data transfer rate. That's no big deal to me since I'll have more time upon retirement.

    Another thing in my plan is to build a custom rig in a few years or possibly sooner. I'll then use this Acer as a test machine.

    Anyone's advice and guidance will be greatly appreciated.
      My System SpecsSystem Spec

  10. #10


    Posts : 5,360
    7/8/ubuntu/Linux Deepin


    I upgraded RAM to 2GBs max. The processor is Intel dual core D series running at 3 gigahertz. This should be more than sufficient for 8.1 resource demands of which I'll upgrade to.
    I have an old desktop with 2gb and an intel Core 2duo E8400. Nt6 x64 all run well on it. There is only heavy paging when I do something intense e.g. updating installation media. I could fix that by upping to 4gb ram, for or other activities it is pretty decent.
      My System SpecsSystem Spec

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