Losing Drive After Reboot

[Meelapo]

I'm having an issue with my secondary hard drive. I purchased a ST4000DM000 (4TB Seagate drive) and I was able to install it successfully and without issue. I ensured the drive was formatted to GPT and I was able to write about 3 TB to it without issue. However, I rebooted the computer and when Windows 7 returned the drive was marked as RAW and Windows says it didn't recognize the file system and that I need to format. What can I do? This is the second this has happened (writes are fine --> reboot --> drive gone). The last time this happened I just formatted and started from scratch.

One thing to point out is that Windows thinks the drive is only 1.67TB large.

Any help would be greatly appreciated!

 

[dotas1]

Some mobos do not support over 3TB HDDs. If yours does, check if you have the latest BIOS (also look in the changelog to see if it's mentioned there). I am not sure that this is your case but it might help if you take a look at this.

 

[Meelapo]

When I go into the BIOS is recognizes the drive as a 4TB drive so I'm assuming that means the BIOS recognizes it.

 

[dotas1]

Ok, then you can try GPT partitioning scheme:
Microsoft Link

 

[Meelapo]

Thanks for your help. As I've stated, when I purchased and installed the disk I already performed the GPT partition steps. When I look at the drive properties in disk manager it says that the drive has already been configured to use GPT. My problem is that when I reboot or whenever I get close to filling the drive it switches to RAW.

 

[dotas1]

I could have sworn that I saw in your first post that you wrote MBR. My bad.
If it's new, it might be problematic. You should ask your retailer for a new one.

EDIT: It might be dysfunctional platters as it has 4x 1TB inside, that's why the lower size on Windows (My previous WD 20EZRX had the same issue).