windows won't see more than 2 hard drives but my bios can see them


  1. Everettdiver
    Posts : 3
    Windows 7 ultimate x64
       New #1

    windows won't see more than 2 hard drives but my bios can see them


    Just built a computer and and I am running windows 7 ultimate 64x and I have 4 hard drives plugged in and it sees them all in the bios but in windows it will only let me see 2 and sometimes it switches which hard drive it sees as the second hard drive. Am I missing something or does anyone know how to fix this. I need more storage space.
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  3. DavidOdden
    Posts : 18
    Win7-64 pro; XP
       New #2

    When you look at the disks in Disk Management, are the missing ones marked as Offline?
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  4. Everettdiver
    Posts : 3
    Windows 7 ultimate x64
    Thread Starter
       New #3

    It doesn't show them at all... it just shows the 2drives
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  6. Brds7t7
    Posts : 1,797
    Win 7 Ultimate, Win 8.1 Pro, Linux Mint 19 Cinnamon (All 64-Bit)
       New #4

    Everettdiver said:
    It doesn't show them at all... it just shows the 2drives
    What size are the hard drives? Over 2TB?
    How old is your pc? Can you see them in device manager?
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  7. Everettdiver
    Posts : 3
    Windows 7 ultimate x64
    Thread Starter
       New #5

    I just built the pc and new components ... I have a 1tb sshd for os and a 4tb sshd , 2tb, 1tb for storage
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  8. Brds7t7
    Posts : 1,797
    Win 7 Ultimate, Win 8.1 Pro, Linux Mint 19 Cinnamon (All 64-Bit)
       New #6

    Everettdiver said:
    I just built the pc and new components ... I have a 1tb sshd for os and a 4tb sshd , 2tb, 1tb for storage
    Which ones aren't showing up? If they're not showing in disk manager at all then it could be your bios isn't set correctly.
    Have you tried opening a command prompt > diskpart > list disk
    Do they show up at all in diskpart?
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  10. Brds7t7
    Posts : 1,797
    Win 7 Ultimate, Win 8.1 Pro, Linux Mint 19 Cinnamon (All 64-Bit)
       New #7

    Also, you can try the free boot disk for minitool partition wizard Best Free Partition Manager for Windows | MiniTool Partition Free
    You might be able to boot into that and initialise the drives.
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  11. alphanumeric
    Posts : 4,466
    Windows 10 Education 64 bit
       New #8

    Check device manager for any devices with a yellow ! or red X. Are the two MIA drives on a different make SATA controller or RAID controller? Might just be a driver issue.
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  12. Layback Bear
    Posts : 25,847
    Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64
       New #9

    Complete this tutorial by Golden so these good folk trying to help you can have a look see.

    Disk Management - Post a Screen Capture Image
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