Windows 8 and 8.1 Forums


  1. #1

    Posts : 32
    Windows 8 x64

    RAW as USB but NTFS as SATA

    My 3TB toshiba suddenly turned RAW from NTFS today out of nowhere. Drive letter is still there, but when I click on it, it asks me to format. HD does not seem to be failing and it fairly new (5 months). So I decided to hook it up to SATA, and all of sudden everything works perfectly again. I'm using about 2/3 of the drives total capacity. It's almost as if once that 2/3 mark was hit, USB stopped recognizing the drive.

    Could this be an issue with USB with larger drives? Anyone have any idea what's going on?


      My System SpecsSystem Spec

  2. #2

    It could be because of USB, on some cutoff size is at 2.2 TB.
      My System SpecsSystem Spec

  3. #3

    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64

    Any HDD can become defective whether it's 1 day old or 5 month old. The problem might be:
    1. HDD has some bad sectors and will get worse.
    2. Too hot inside the enclosure. IMHO, the external USB HDD is not designed for constant use and there's no room to dissipate heat once it becomes real hot.
    3. The USB interface is gone bad.

    1. Download Unzip and run to check the disk status
    2. From Admin command prompt, run: chkdsk /r X: where X: is the drive letter of the HDD.
      Since this is a 3TB HDD, it will take a long time to complete, hours and sometimes appears to be stalled so be patient.
    3. While you still can access the HD. Back up your data to another HD.
    4. If still under warranty, I would ask for RMA. I had this happened to me with a 3TB WD. Fortunately I bought from COSCO and returned it after one year with no question asked.
      My System SpecsSystem Spec

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