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3 TB HDD now GPT, but still can't create simple volume over 1907600 MB

Last response: in Storage
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October 7, 2013 3:07:44 PM

It's a DT01ACA300 hard drive.

Using Windows 8.1 and an Asrock H77M UEFI motherboard.

Any ideas?
a c 100 G Storage
a b * Windows 8
October 7, 2013 3:27:53 PM

I never had an issue.

So it shows about 2/3rd partitioned and 1/3rd unallocated now in Disk Managment?
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October 7, 2013 3:35:34 PM

photonboy said:
I never had an issue.

So it shows about 2/3rd partitioned and 1/3rd unallocated now in Disk Managment?


I haven't formatted it yet as I want more than 2 TB, which is all it will allow.



I've installed the ASRock 3TB+ Unlocker Utility but nothing appears to have changed?

EDIT: Restarting the computer fixed it.
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a c 316 G Storage
October 7, 2013 3:49:33 PM

It's not a 2TiB issue, so Unlocker won't help.

Instead use HDAT2, HDD Capacity Restore Tool, or http://www.itsecure.at/hparemove-v0-1.

1907600 MB = 2 000 263 577 600 bytes = 2TB (not 2TiB)
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a c 316 G Storage
October 7, 2013 4:05:03 PM

ISTM that Unlocker's apparent success may have been a coincidence. The marketing blurb states that "the fantastic 3TB+ Unlocker tool offers a tweak-friendly feature, breaking the limitation of 32-bit operation system that could only detect the hard disk within 2048GB. "

This suggests that Unlocker is designed to circumvent the 32-bit LBA limitation of your OS. Notice that 2048GB = 2TiB, not 2TB. The latter is a BIOS bug.

Sometimes the 2TB bug can be automatically repaired simply by changing the boot order in BIOS.
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a c 100 G Storage
a b * Windows 8
October 7, 2013 4:57:38 PM

When I installed my 3TB drive I did it something like THIS:

1. Computer Management-> Disk Management
2. right-click the unallocated space on the 3TB drive and "Create new Volume"
3. The drive should then show 2794GB approximately and HEALTHY.

I forget if it asked if it was to be MBR or GPT or if it even asked but I had no issues (GPT if asked I believe). You can't FORMAT a drive unless the Volume is created first, though it is formatted as part of creating the Volume.

*So where in the above process does the problem occur?

I always do a FULL FORMAT on any new hard drive after the Volume has been created to build up the bad sector table. It will take perhaps 12 hours or so I think.

(If the drive already has a volume and doesn't show unallocated space, then right-click and DELETE any volume present and repeat my steps.)
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