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Solved: 4TB Seagate NAS drive now PC won't boot from cold

Discussion in 'Hardware' started by Spacedog79, Jan 5, 2014.

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  1. Spacedog79

    Spacedog79 Thread Starter

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    My desktop system has a 2TB WD main hard drive with Windows 7 Ultimate x64 on it and 2x 3TB Samsung drives for storage.

    I added a 4TB Seagate NAS drive ST4000VN000 for more storage and now the PC won't boot properly in the morning.

    - On first boot in the morning Windows will load very slowly, and the 4TB drive won't show up in explorer.
    - If I reboot and look in BIOS the 4TB drive is not listed as present.
    - If I switch the machine off, and on again the 4TB drive will appear in BIOS, and will function normally all day, including after extended periods of the whole machine being switched off.

    - I have swapped SATA cables and power leads endlessly and no improvement, and my 3 original drives continue to function normally
    - The SATA ports are set to AHCI
    - My mobo is a Gigabyte 990XA-UD3 Rev 3.0 with the latest BIOS loaded
    - My PSU is a Hiper 580W Type-R Modular, all voltages appear to be good

    I work with computers professionally, but this one has me a bit stumped. Could my new drive be faulty? Maybe its because it is an NAS drive, not desktop? Could my motherboard have a problem with 4TB drives?

    SOLVED: This morning I went immediately in to BIOS instead of trying to load Windows again and noticed the +12v rail was at 10.5v, and over the next few minutes it rose to 11.8v. This explains everything for me, I guess the PSU is failing and the new drive must be extra sensitive to low voltages. I will replace the PSU and report back if it doesn't fix things.
     
  2. hangman117

    hangman117

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    yes the nas drive was intended to be connected along with the nas head rather than the drive directly which has an embedded os. you would have to reformat it to guid partition table to work effectively which would only work with uefi not a bios I think. so basically the size of the drive is causing a problem.
     
  3. Spacedog79

    Spacedog79 Thread Starter

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    The drive is already formatted as GPT like my other 3TB drives, and my BIOS is UEFI and should work with large drives. I had read that NAS drives would work fine in a desktop environment, it is just that they were tuned slightly differently and had extra balancing to avoid resonance with other drives. Perhaps not?

    It is strange that the drive is only not detected when booting in the morning. If I leave the computer off during the day then start it up again the drive is detected fine and works as expected, with good transfer speeds.

    Also Seatools for Windows reports that the drive has no problems.
     
  4. TonyB25

    TonyB25 Banned

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    A NAS drive shouldn't show up in the BIOS. It's in a NAS enclosure connected to the router?
     
  5. Spacedog79

    Spacedog79 Thread Starter

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    Seagate call it an NAS drive, but it is still a 3.5" internal SATA hard drive.
     
  6. hangman117

    hangman117

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    umm so you solved it? what was your solution?
     
  7. Spacedog79

    Spacedog79 Thread Starter

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    I edited my first post to explain the resolution. What I think happened was my PSU wasn't giving enough voltage on +12v when cold. Every time I had checked it before the PSU was warm and giving a good voltage so I never suspected it was the issue.

    I have a new PSU on order which should have been here today but the order got mucked up, so will know for sure when it gets here tomorrow.
     
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