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Computer not recognizing full size of harddrive

Discussion in 'PC Hardware' started by Tasha, 2008/08/10.

  1. 2008/08/10
    Tasha

    Tasha Inactive Thread Starter

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    I just purchased a new Seagate 250gb harddrive and installed it into my computer, installed windows, everthing went smoothly enough but when I went into My Computer it tells me that my harddrive is only 127gb. The windows installation disk I have is old but not so old that it doesn't have service pack 1. I updated it to service pack 3 still no go.

    I checked the jumper in the back, it is on the correct position. I realize that the harddrive may not actually have exactly 250gb like the sellers description suggests because of a different counting system but to go from 250 to 127, that really does not seem like a small discrepency in counting. I used the NTFS file system. I have reinstalled windows like 3 times now. I have followed all the advice that I have found (and can understand). I checked on BIOS to see what it was reporting and it says that the max capacity is 65gb.


    The gateway website says that the listing there is for looks only and it shouldn't effect anything, but I read on a different site that whatever the BIOS reads the computer reads, and if I exceed the limits set by BIOS it will cause the data to become corrupt. There is an update for BIOS for my particular motherboard but I have read quite a few horror stories about updating and then having a computer that is worthless. Is there anything that I can do before having to attempt something that could potentially ruin my system? All of your help is greatly appretiated


    I have a old Gateway Performance 550 with an intel 3 550mhz proccessor.
    I am running Windows XP home edition.
    The harddrive is Seagate 250gb 7200.10 IDE ATA

    If you need anymore information just let me know
     
  2. 2008/08/10
    PeteC

    PeteC SuperGeek Staff

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    Tasha - Welcome to the Board :)

    You have come up against the 127 Gb limitation of a BIOS which does not support 48-bit Logical Block Addressing (LBA). There are two ways round this ....

    Look on the manufacturer's website (Gateway) for a BIOS update which adds 48-bit LBA - be sure that any bios update offered includes this facility before downloading otherwise there is no point :)

    Alternatively go to Disk Management (Right click My Computer icon > Manage > Disk Management) where you should see your drive showing an amount of Unallocated space - ~100-120 Mb. Create a partition in this space and you will have access to the full capacity of your disk, albeit in 2 partitions.

    BTW Apart from the way in which manufacturers tend to overstate their hard driver sizes by using 1000Mb = 1 Gb remember that part of the drive is taken up by the file system - NTFS or FAT.

    Example - my 250 Gb Hitachi show a capacity of 232.88 Gb in Disk Management. This is normal.
     

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  4. 2008/08/10
    Tasha

    Tasha Inactive Thread Starter

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    Concerning LBA


    Thanks for the warm welcome and info.

    My LBA states that it is enabled; however, I cannot find information to guide me as to how to determine if the LBA supports the 48-bit. Direction would be appreciated.

    Also, I re-installed windows and deleted the partition it was on. I re-made a new partition, but it would not allow me to use the full unallocated gigabytes. The beginning installation of windows says I only have 131 on the harddrive-and that was at the point that I had deleted the first partition created, so I was thinking the full amount would have shown.

    Any instruction here, as to how to create the second partition, without causing harm/damage, would be greatly appreciated. I do plan on getting a bios upgrade, as one is reported to be available. Still afraid to use it after reading many stories of ruined systems after installing.

    What is your take/idea regarding bios upgrades? And again, many thanks.
    :)
     
  5. 2008/08/10
    PeteC

    PeteC SuperGeek Staff

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    A little research has brought to light that there are 2 types of LBA .....
    I suspect your BIOS only supports 28-bit LBA, hence the disk limit of 128 Gb.
    I would only make a BIOS upgrade if there was a clear advantage in doing so. i.e. if the upgrade introduced a feature that I wanted or corrected errors in previous bios versions. Hence my comment re. checking what additional facilities the updated BIOS has to offer, specifically 48-bit LBA. Flashing the BIOS is straight forward enough providing that you follow the instructions to the letter.
    As I posted ....
    Simply right click in the unallocated space and select Make partition from the menu - follow the wizard through, accept the largest size possible, i.e. all the unallocated space and format it to match your first partition - NTFS I guess.
     
  6. 2008/08/11
    Steve R Jones

    Steve R Jones SuperGeek Staff

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    XP SP1 is the issue. You must slip stream at least SP2 to get past the 127gig limit. That, ot go with multi partitions.
     
  7. 2008/08/11
    PeteC

    PeteC SuperGeek Staff

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    Are you sure, Steve?
    The computer is very old - Gateway Performance 550 with an intel 3 550mhz proccessor - I would stil put money - not a lot :) - on a BIOS limitation.
     
  8. 2008/08/11
    Steve R Jones

    Steve R Jones SuperGeek Staff

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    I was off by one service pack..

    By default, the original release version of Windows XP Home Edition and of Windows XP Professional do not have 48-bit LBA support. Your computer must meet the following requirements to use 48-bit LBA ATAPI support:
    • 48-bit LBA-compatible BIOS.
    • 137-GB hard disk or larger.
    • You must have Windows XP SP1 installed.
    http://support.microsoft.com/kb/303013/en-us
     
  9. 2008/08/11
    mflynn

    mflynn Inactive

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    Hi Tasha

    This is not really a problem!

    Pete's first advice to create a second partition is the best solution even if the Bios did support the drive.

    I would never dedicate the entire capacity of a drive to Windows.

    Virus's and malware can affect Windows and more easily lead to data loss. Something can happen to the booting of Windows.

    Create the 2nd drive and keep Photos, Downloads and other data there away from the operating system. After it is created you can move the My Documents folder there also. A speed tweak would be to move the Windows Swap file (pagefile.sys) to the 2nd drive.

    Other benifits, faster defrag of the OS (Windows) drive. Smaller Windows drive for backing up. Vius scanning the OS would be much faster.

    You can use a drive imaging program and image to the other drive then use CD burning via Windows to copy to CD but leave the image on the drive. Allowing fast restore of the OS drive if it gets blown.

    Lets say you wished to upgrade c: by reformating and re-installing windows or going to another OS. Then you could put all you want to save on the second drive while doing this then quickly back when ready.

    The above could be done with CD/DVD's but doing it this way is much less hassle.

    I can think of no good reason not to split the drive.

    With a drive this size I would actually only dedicate 60g to C: for windows and split the rest of the space equally into 3 drives. D: E: F: and deicate each for a dedicated use.

    Mike
     

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