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Windows 7: SSD unknown in Disk Management - not initialised, no unallocated space

09 Feb 2016   #1

Windows 7 Professional x64
SSD unknown in Disk Management - not initialised, no unallocated space

Hi everyone,

I need some help desperately with my Samsung 840 EVO 250GB SSD. Until yesterday, I had been using it for less than a year on a desktop PC to run a Windows 7 Professional x64 installation.

After it suddenly stopped working, it can no longer boot into Windows ("BOOTMGR is missing" is shown at startup), and it cannot be recognised in BIOS either.

I removed it and connected it as an external drive to a couple of other computers (a laptop running Windows 7 Home Premium x64 and a desktop running Windows 8 x64). Even though it showed up as a generic USB device in Device Manager and in the taskbar notification area, it did not appear as a drive in Explorer.

Disk Management showed the following screenshot, where it is listed as Disk 1, which is Unknown and Not Initialized. More importantly, because this seems to be less common than other similarly issues I've looked at here, the disk space doesn't even show.

I've since tried a few tools recommended in previous threads here, with no success:
PhotoRec - did not detect the drive at all
Partition Wizard (free edition) - the drive shows up as 0MB, so there are no partitions to work with
Power Data Recovery (free) - this actually crashes when I select either Lost Partition Recover or Damaged Partition Recovery

I really need to retrieve some data off the disk, and I'm hoping that's not impossible at this point. The fact that the SSD can still power on and (somewhat) show up as an external device is giving me hope, but I'm currently at a loss as to what else I could try.

Please do help me out here! Thanks in advance.

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SSD unknown in Disk Management - not initialised, no unallocated space-ssd_01.png  
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 SSD unknown in Disk Management - not initialised, no unallocated space

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