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Windows 7: 3TB Harddrive showing as 746gb after abrupt error in HDDerase

01 Jan 2018   #1
Xad

Windows 7 x64, Windows XP 32bit
 
 
3TB Harddrive showing as 746gb after abrupt error in HDDerase

I've been trying to fix this mess i created for the last few hours and i'm out of ideas.

I have Windows 7 64 bit and already have a 4TB drive in GPT Disk mode that has worked fine for years. I had another spare 3TB drive that i decided to enhanced secure erase as i wanted to get rid of it. I have used HDDerase (via UBCD) plenty of times over the years with no issues, but this time while trying to wipe the 3TB drive, which didn't really need to be wiped as it's barely used, i kept getting errors about how the drive cannot be unlocked even though i went through the standard procedures of setting IDE mode, hard shut down, etc.

Finally after reading the FAQ i decided to go for the 3rd option as the two other methods failed, third option being where you disconnect the drive, turn on the PC and just before HddErase is started you connect the drive thereby bypassing the BIOS lock. This did work and it showed 510 minutes as the time required for erase, but after 6 hours or so, an error showed up and erase was abruptly cancelled, and ever since then i've been unable to see the full 3TB and stuck with 746gb even in GPT Disk mode.


I think the issue is that when HDDErase usually completes it writes the LBA info at the end or something like that, but being that the procedure ended abruptly, it screwed things up. When i looked at LBA info, it shows around 1.5 billion while the hard drive label states it's around 5.8 billion.

Anyone know how to repair this and how i've managed to screw this up so badly? I've connected the drive to another computer and it still shows as 746gb. I tried using MHDD and the HPA command i found via google but i get an error saying this only works in LBA mode or i get an error that the drive hasn't been detected and the drive isn't even shown in the list rather just port connection numbers.

Any idea? Maybe even how i can successfully write the LBA info manually if that is the issue, as i failed to do that with MHDD...if that is the issue in the first place.


My System SpecsSystem Spec
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01 Jan 2018   #2
SIW2

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64
 
 

You could see if Partition guru is any use. PartitionGuru

It is included in my boot media

17514x64v5.iso
My System SpecsSystem Spec
01 Jan 2018   #3
Xad

Windows 7 x64, Windows XP 32bit
 
 

Ran PartitionGuru, not sure if there's any settings in the software that will fix the issue though. I think it is something to do with the LBA info on the drive that's been corrupted or something.
My System SpecsSystem Spec
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01 Jan 2018   #4
SIW2

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64
 
 

I don't know to do that.

Maybe try hddguru forums

View forum - HddSurgery support forum
My System SpecsSystem Spec
01 Jan 2018   #5
Xad

Windows 7 x64, Windows XP 32bit
 
 

GOOD News, fixed it

After hours of trying everything, came across an old software called HDD Capacity Restore which doesn't work in Windows 7 but fortunately i had Windows XP in dual boot, so loaded up, ran the software with a single click, it detected the actual factory drive size, did it's thing and then hard shut down. Restarted and i have the 3TB drive back. PHEW. Everything working great now.
My System SpecsSystem Spec
01 Jan 2018   #6
SIW2

Microsoft Community Contributor Award Recipient

Vista x64 / 7 X64
 
 

Thanks for letting us know. Sounds like a useful tool :)

Doen't seem to work on 64 bit OS. Will try it with 32 bit pe when I have a mo.
My System SpecsSystem Spec
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 3TB Harddrive showing as 746gb after abrupt error in HDDerase




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