External Hard Drive Partition Problem (Encrypted with TrueCrypt)

Anxara

Reputable
Aug 23, 2014
2
0
4,510
I have a 4 terabyte Seagate external hard drive. I am on Windows 8. I had the hard drive encrypted with TrueCrypt and still have the correct password. A few weeks ago, the power supply on the enclosure went bad, so I had to get a new enclosure/power supply. When I reconnected the hard drive, TrueCrypt will no longer decrypt it.

In My Computer it says (as it always would), that the hard drive needs to be formatted. It did this before as well, as it does with all TrueCrypt encrypted hard drives. However, it appears that the partitions on the drive somehow got changed. In Disk Management it is showing only 465 MB as "Healthy (Primary Partition)" and then it shows 2 additional partitions as "Unallocated". One of the unallocated partitions is 1582 MB and the other is 1678 MB. Disk Management shows the Healthy partition on the far left, and then the other 2 unallocated partitions follow it on the right.

How can I "combine" these 3 partitions to get the original, single partition back? I don't want to lose or change any data, since I still want to be able to decrypt it once the sections are combined again. I know it is *not* a problem with the password. I would appreciate any help as I'm at a loss as to what to do!
 
Solution
Your replacement enclosure is configured with 512-byte sectors. However, Seagate's external drives are configured in MBR mode with a 4KB sector size. When you remove such a drive from its enclosure, you expose its native 512e sector size. Sector 0 remains in the same place, so the OS can still see the partition table, but every other sector is out by a factor of 8.

465 GiB x 8 = 3.994 TB

You need to use data recovery software (eg R-Studio) that understands the fact that you now have a 4Kn file system on 512e hardware.

Alternatively, find another enclosure that is configured with 4096-byte sectors.

Anxara

Reputable
Aug 23, 2014
2
0
4,510

Not an option. There is no backup and I need the data off of it.
 
Your replacement enclosure is configured with 512-byte sectors. However, Seagate's external drives are configured in MBR mode with a 4KB sector size. When you remove such a drive from its enclosure, you expose its native 512e sector size. Sector 0 remains in the same place, so the OS can still see the partition table, but every other sector is out by a factor of 8.

465 GiB x 8 = 3.994 TB

You need to use data recovery software (eg R-Studio) that understands the fact that you now have a 4Kn file system on 512e hardware.

Alternatively, find another enclosure that is configured with 4096-byte sectors.
 
Solution