Windows 10: 3tb drive works in win7, win 10 no. Solved

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  1.    16 Nov 2017 #11

    ThrashZone said: View Post
    Hi,
    Do you use any file or folder encryption software ?
    I've personally never seen a disk with protected labeled like that :/
    no, what label?
      My ComputerSystem Spec

  2. jumanji's Avatar
    Posts : 759
    Windows 7 Ultimate 32bit
       16 Nov 2017 #12

    Hi sdowney717,

    After doing a quick research on this topic, I also came to the same conclusion as Caledon Ken ( his post #8) that you should copy all data with Windows 7 and then initialise the drive as GPT and format it with Windows 10. ( I know that it is a dual boot and not a split as people have imagined it to be)

    I know what exactly is happening. A GPT drive has a protective MBR at sector 0 which has a partition table pointing to 2TB. For some reason Windows 10 is reading your drive as an MBR drive and pointing to that 2TB partition.

    (I have also seen some posts suggesting that this could happen if the drive mode is set to RAID in the BIOS and that it should be set to AHCI. But I will be wary of doing this since in the good old days we were advised not to change it just like that. An elaborate procedure was outlined if one wanted to change. But in later days I had seen people changing from RAID to AHCI and viceversa with impunity and I don't know where the old stops and new regime comes in
    and where your regime lies :).)

    So safe to try what Caledon Ken suggests.
      My ComputerSystem Spec

  3.    16 Nov 2017 #13

    Caledon Ken said: View Post
    You will notice that the disk is listed as GPT Protective Partition.

    Read some google articles that came up when I searched this topic. Not a quick answer. I would place it back on Windows 7 device, copy data off and then re-initialize on Windows 10. Then copy data back on.

    Not a desired process. With the quick search I did I did not see quick answer. You can search more on this topic.

    Maybe this issue surrounds item Dalchina mentioned about BIOS in use?

    This does not answer why Windows is split between drives. Did you install Windows with both of your 1TB drives connected? At one point was this a dual boot system?


    Ken
    never was dual boot system.
    I installed win7 withonly its drive in pc. then i disconnected the drive and installed win10 withonly its drive connected. what do you guys mean split between drives?
      My ComputerSystem Spec

  4.    16 Nov 2017 #14

    jumanji said: View Post
    Hi sdowney717,

    After doing a quick research on this topic, I also came to the same conclusion as Caledon Ken ( his post #8) that you should copy all data with Windows 7 and then initialise the drive as GPT and format it with Windows 10.

    I know what exactly is happening. A GPT drive has a protective MBR at sector 0 which has a partition table pointing to 2TB. For some reason Windows 10 is reading your drive as an MBR drive and pointing to that 2TB partition.

    (I have also seen some posts suggesting that this could happen if the drive mode is set to RAID in the BIOS and that it should be set to AHCI. But I will be wary of doing this since in the good old days we were advised not to change it just like that. An elaborate procedure was outlined if one wanted to change. But in later days I had seen people changing from RAID to AHCI and viceversa with impunity and I don't know where the old stops and new regime comes in
    and where your regime lies :).)

    So safe to try what Caledon Ken suggests.
    interesting you mention set to raid, as yes in bios is set to raid, not ahci. would changing that help?

    i need the 3tb disc work in win7 and win10, it must or i will never run win10 on this pc.
    raid is not setup, i get a bios prompt to do that but ignore it.

    still copying. is there a 3rd party win10 utility that could fix without copying back over?
    Attached Thumbnails Attached Thumbnails copy1.PNG  
      My ComputerSystem Spec

  5.    16 Nov 2017 #15

    About raid or AHCI,
    AHCI/RAID/SATA - Storage - Toms Hardware

    poster said sata 5 and 6 ports wont be seen if set to sata mode?? I only have ide, raid or AHCI mode, dont see any 'sata' mode.
    .
    However I can tell you all 6 sata ports work whether a hard disc or dvd writer is hooked up to any sata port. Hey, i dont have a clue why it is set to raid.


    "When SATA is configured as [SATA Mode] in BIOS, only SATA ports 1-4 can be detected. Ensure to install the AHCI driver to detect and use SATA port 5-6 in AHCI mode under OS."

    I suppose if I set to AHCI mode, and it cant boot, then I could switch it back.
    Maybe can you install AHCI driver before switching mode in both win7 and win10?
      My ComputerSystem Spec

  6. jumanji's Avatar
    Posts : 759
    Windows 7 Ultimate 32bit
       16 Nov 2017 #16

    Changing it to AHCI may help but will it break something - your Windows 7? ( I have Windows 7 on a RAID and so had never tried changing to AHCI .) That is my concern already expressed. I would leave it to other experts to dwelve on it.
      My ComputerSystem Spec

  7.    16 Nov 2017 #17

    jumanji said: View Post
    Changing it to AHCI may help but will it break something - your Windows 7? ( I have Windows 7 on a RAID and so had never tried changing to AHCI .) That is my concern already expressed. I would leave it to other experts to dwelve on it.
    Found this here. Can win10 handle this on the fly?

    How to Install AHCI Drivers in Windows 7 After Setup | TurboFuture

    1. Once your clean install has loaded and installed any devices detected go to your manufacturer's website, download and install the chipset drivers only
    2. Restart Windows
    3. Go to Start Menu-> Control Panel-> Device Manager-> expand IDE ATA/ATAPI Controllers

      If you don't know the name/number of your IDE/SATA controller, use the initially installed Microsoft driver for reference. Write it down on paper, just in case.

      So, you should have something like: ATA Channel 0, ATA Channel 1, Intel 12345GM IDE/ATAPI Controller.

      Or as it was in my case I had just the brand name and family name which was GBM, so that makes something like Intel GM-Family IDE Controller.

      IMPORTANT: Search only and specifically for the controller brand+model displayed in your Device Manager as it may differ from the one advertised with your laptop. Also the drivers in your computer manufacturer's site may differ from this, as they were in my case. The AHCI driver from asus.com was for Intel N-10 chipset.. Thanks for that ASUS!
    4. Now that you know that brand and model number, or family name, of your IDE Controller (ex. Intel 13245GM), simply Google "Intel 12345GM AHCI driver download" and one of the Top 3 results should be the page where you can download the driver.
      advice: make sure you download from manufacturer sites (ex: intel.com), not potential fraud like.. ezdownloads2go.com
    5. Now that you, hopefully, have found the required driver just unzip it in a folder of your liking. It should contain about 10 files with several .inf's along.
    6. Go to Start Menu-> Control Panel-> Device Manager-> expand IDE ATA/ATAPI Controllers-> right-click on your IDE Controller-> Update Driver Software..
    7. Browse my computer for driver software
    8. Let me pick from a list of device drivers on my computer
    9. Have Disk...
    10. Specify the folder where you unzipped the driver files
    11. Select the .inf file with AHCI in its file name
    12. Click OK
    13. Select your brand+model driver now that it is loaded in the manufacturer's list
      Note: in case there is nothing shown uncheck "Show compatible hardware"
    14. Click OK, wait loading and close the dialog window
    15. DO NOT RESTART WINDOWS
    16. Double-check that the IDE Controller has updated to the expected brand and model name
    17. If it has not, repeat steps 7-17
    18. Restart Windows
    19. Enter BIOS-> IDE Controller Settings
    20. Set your IDE Controller mode from IDE to AHCI
    21. And, ta-da, your Windows 7 installation is now running in AHCI mode
    22. Install any other peripherals and programs you need
      My ComputerSystem Spec

  8.    16 Nov 2017 #18

    Protective partition:
    Can You Access GPT Protective Partition Or Recover Data Off It

    Access GPT Protective Partition and Restore Data in Windows 10/8/7 – EaseUS

    Superficially scanning those suggests as said above, copy the data off the disk.
    Trying to manipulate the disk itself seems risky.
      My ComputerSystem Spec

  9. jumanji's Avatar
    Posts : 759
    Windows 7 Ultimate 32bit
       16 Nov 2017 #19

    Yep @ dalchina. That is relevant only if the OP wants to recover data. Here he can access and see the data with Windows 7. So no recovery aspect comes into picture.
      My ComputerSystem Spec

  10.    16 Nov 2017 #20

    for win10 to go to ahci
    IDE to AHCI Windows 10 - Windows 10 Support

    Yes, all this would be painful! I suppose. but is possible. Win10 seems easier.

    1. Right-click the Windows Start Menu. Choose Command Prompt (Admin).
    2. Type this command and press ENTER: bcdedit /set {current} safeboot minimal
    3. Restart the computer and enter BIOS Setup (the key to press varies between systems).
    4. Change the SATA Operation mode to AHCI from either IDE or RAID (again, the language varies).
    5. Save changes and exit Setup and Windows will automatically boot to Safe Mode.
    6. Right-click the Windows Start Menu once more. Choose Command Prompt (Admin).
    7. Type this command and press ENTER: bcdedit /deletevalue {current} safeboot
    8. Reboot once more and Windows will automatically start with AHCI drivers enabled.
      My ComputerSystem Spec


 
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