3tb drive reading as 746.39gb on windows 7 pro

By MysterioMask
Jul 2, 2013
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  1. I just got a 3tb drive and put it into this machine. But its only showing up as 746.39gb. The machine is running windows 7 pro, but it was upgraded from xp. I do not need it to be a bootable or system drive. I just need it more or less for storage as there will be a lot of video files recorded and saved on the drive.

    Is there a way to make the system read the whole drive without reinstalling the operating system. Or id be fine with splitting the drive into a 2 tb and 1 tb or three 1tb drives if that's easier to do. But once again without reinstalling the operating system.

    Or is it easier to take it back and just get a 2tb or few 1tb drives?
  2. St1ckM4n

    St1ckM4n TS Evangelist Posts: 2,920   +627

    Launch Disk Management, format the partitions there.
  3. MysterioMask

    MysterioMask TS Enthusiast Topic Starter Posts: 117

    Uhh yeah, the problem is it only shows as 746gb for the entire drive.
  4. LinkedKube

    LinkedKube TechSpot Project Baby Posts: 3,481   +44

    I remember something about disk drives larger than 2tbs can only be fully utilized with win 7 or higher. Too lazy to find it, do a google search.
  5. St1ckM4n

    St1ckM4n TS Evangelist Posts: 2,920   +627

    Yeah, he has Win7 Pro. Also that was relating more to boot disks, as the HDD manufacturers actually 'tricked' the OS into thinking it was a multi-disk partition.

    MysterioMask: so you're saying when you delete all partitions, then try and format, the available capacity is still only 750GB?

    Also, do this (taken from here):
  6. slh28

    slh28 TechSpot Paladin Posts: 1,706   +170

  7. MysterioMask

    MysterioMask TS Enthusiast Topic Starter Posts: 117

    I didn't feel like dealing with the headache so I just returned it and got smaller ones and raided them together.
  8. St1ckM4n

    St1ckM4n TS Evangelist Posts: 2,920   +627

    Keep in mind that your chance of failure on RAID0 increases.
  9. Darth Shiv

    Darth Shiv TS Evangelist Posts: 1,415   +303

    I thought older mobos also had issues with > 2TB drives as well? Needs to support GPT or something?
  10. misor

    misor TS Evangelist Posts: 1,130   +188

    If it's a Seagate/Maxtor hdd, download/install Seagate disc wizard for windows (or use bootable Seagate disc wizard cd edition) to initialize the new hdd.
    the new hdd will be partitioned according to your preference (gpt, mbr).

    or you can try to use mini tool partition wizard which also has a bootable cd edition.

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