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Hard disk is showing Half capacity

By sameerbo
Jan 18, 2007
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  1. Hi All,

    I have SEGATE 250 GB SATA Harddisk, this i bought only yersterday. The BIOS shows the capacity as 250 GB. but during OS(winxp proff. SP1) installation is show only 125gb harddisk.

    Please suggest somthing to solve this issue.

    Thanks in advance
    Sameer
  2. Rik

    Rik Banned Posts: 4,985

    Without knowing exactly what operating system you are using then the chances of answering that question zero. It would be handy to know what computer you have as well.
  3. sameerbo

    sameerbo TS Rookie Topic Starter

    I am tring with win xp sp1. And my machine config
    Motherboard: ASUS M2NPV-VM
    Processor: AMD X2 4200+
    Harsdisk: SEGATE 250 GB SATA
    RAM: Trascend 1 GB
    OS: WINXP Pro. SP1
  4. Rik

    Rik Banned Posts: 4,985

    Now we have some information your problem is obvious! Windows XP sp1 cannot read hard drives bigger than 128 gig. What you need to do is go to the Microsoft website and update your version of Windows to service Pack 2.
    Once you have done this you should get full capacity of the hard drive.
  5. sameerbo

    sameerbo TS Rookie Topic Starter

    Thank a lot for your help, I will try to get SP2 now :)
  6. Jesse_hz

    Jesse_hz TS Maniac Posts: 638

    Keep in mind that even after you have updated to SP2 your harddrive still wont show up as 250GB. I will most likely be somewhere around 238GB and this isn't the fault of Windows, but because of the fact that harddrive manufacturers use MB, but everyone else uses MiB. What Windows calls MB is actually MiB.

    1,000,000 bytes = 1Megabyte
    1,048,576 bytes = 1Mebibyte

    If you have already formatted the drive with one 125GB partition you will after the update either need to remove that and create a new partition that spans the entire drive or create a new partition that uses the left over space that the other partition doesn't.
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