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Windows 7: 3TB external suddenly becomes 746GB unallocated

19 Jun 2014   #31
WhyAlwaysM3

Win 7 x64 and Vista x64
 
 

I intended to use the drive's full capacity when I bought it, so GPT was the order of the day from the start.

TestDisk analyze also detects/suggests EFI/GPT.


My System SpecsSystem Spec
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19 Jun 2014   #32
jumanji

Windows 7 Home Premium 32 bit
 
 

Yep, I also saw the MSR partition in Test Disk/photoRec screenshot. But AOMEI shows it as an MBR disk that is why I am baffled.

Anyway, let us not hurry up.

Let us see how it goes when you hook the dock+HDD on the Windows 7 machine.
My System SpecsSystem Spec
19 Jun 2014   #33
WhyAlwaysM3

Win 7 x64 and Vista x64
 
 

Will do.

Once again I appreciate the assistance from everyone, hopefully it ends well.
My System SpecsSystem Spec
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19 Jun 2014   #34
Anshad Edavana

Windows 7 Ultimate x64
 
 

Both AOMEI and PartitionGuru seems to detect the disk as MBR but if i assume correctly, both softwares detect lost partitions by looking for NTFS boot sector signature. So there is still a chance for the disk to be partitioned in GPT scheme. A deep scan with "TestDisk" or "PartitionGuru" may detect the missing partitions but before doing that we should check and confirm whether the partitions are actually lost or it is the Vista machine which is unable to read them.

I would like to know the result of :

1. Whether all partitions can be accessed if the HDD is connected to the Win7 machine via dock.

2. Whether all partitions can be accessed if the HDD is connected to the Win7 machine via a direct SATA port.
My System SpecsSystem Spec
20 Jun 2014   #35
WhyAlwaysM3

Win 7 x64 and Vista x64
 
 

Connected drive to Win 7 machine, without the dock.

3TB external suddenly becomes 746GB unallocated-captureall.jpg
Partition Guru results

3TB external suddenly becomes 746GB unallocated-capture4.jpg
TeskDisk prompt


My System SpecsSystem Spec
21 Jun 2014   #36
Slartybart

x64 (6.3.9600) Win8.1 Pro & soon dual boot x64 (6.1.7601) Win7_SP1 HomePrem
 
 

Anshad is pursuing the issue with you - please continue following the directions he gi

I am posting this as reference only, no action should be taken based on the information in this post at this point.

Norton Partition Magic manual:
ftp://ftp.symantec.com/public/englis...ionmagic_8.pdf

There is a reference to a Rescue disk that might serve some purpose later.

There is also reference to Partition Magic being in a hidden partition on the drive. I don't know if this is a red herring or not.

For some reason I keep thinking Norton Partition magic lies to the OS and resolves the addressing itself. But I have no definitive information.

I am of little help on this thread, so I will stay on the side lines.
My System SpecsSystem Spec
21 Jun 2014   #37
WhyAlwaysM3

Win 7 x64 and Vista x64
 
 

Give me the bad news gently...
My System SpecsSystem Spec
21 Jun 2014   #38
Anshad Edavana

Windows 7 Ultimate x64
 
 

Sorry for the late reply. Is the "TestDisk" screen shot is after a deep scan ?.

There are two more tools ( commercial ) which might be able to detect the missing partitions so my hope is not ended yet. Please try "Active Partition Recovery" first. Trail version will let us know whether lost partitions can be recovered.

http://www.partition-recovery.com/

There are both normal scan and super scan options available. I would highly recommend reading the accompanying manual ( help file ) first before beginning the scan. First try "Quick Scan" and if it can't detect the missing partitions, try "Super Scan".

User guide : http://www.partition-recovery.com/do...n-recovery.pdf

Official Video guide : http://www.youtube.com/watch?v=tl5XgWJ3xK8
My System SpecsSystem Spec
22 Jun 2014   #39
WhyAlwaysM3

Win 7 x64 and Vista x64
 
 

"TestDisk" was 'Deeper Scan'. Should anything else be done in TestDisk? Continue?

I will give Active Partition Recovery a run and post results.
My System SpecsSystem Spec
22 Jun 2014   #40
Anshad Edavana

Windows 7 Ultimate x64
 
 

Quote:
"TestDisk" was 'Deeper Scan'. Should anything else be done in TestDisk? Continue?
Let's first see how effective is " Active Partition Recovery". It helped me one time to recover a lost partition which is not detected by "TestDisk".

If "Active Partition Recovery" Quick scan and Super scan fails, try "TestDisk" again but this time manually select MBR partition scheme regardless of it's advise to search for EFI partitions.
My System SpecsSystem Spec
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 3TB external suddenly becomes 746GB unallocated




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