Windows 10: HDD Partition becomes unallocated after Windows 10 installation.
HDD Partition becomes unallocated after Windows 10 installation.
I have a SSD where my operating system is installed.
I also have a 3 3TB drives.
A 746.52 partition on one of the drives became unallocated after installation of windows 10.
I've managed to recover all the data from the unallocated partition. Would now like to fix the partition.
I think it may be something to do with MBR/GPT?
Here's a screen print from disk management.
Any help appreciated.
Can you boot with Disc 0 completely disconnected?
I'd guess you can. If so, I don't think you need partition I on disc 0.
You should be able to make disc 0 to behave like disc 2, which is also a 3 TB drive. Disc 0 appears to be initialized as MBR. If you want it do be like disc 2 with a single partition covering the entire 3 TB, you'd need to re-initialize it as GPT, just like disc 2. You'd have to move that data off of the J partition and then delete the J partition to do that. I think there are applications that say they can convert from MBR to GPT without losing data, but I wouldn't trust that. I'd plan to wipe that drive and start over--but you first need to confirm you can boot with disc 0 disconnected.
Was that drive 0 connected when you installed to the SSD? If so, usually a bad idea to have more than 1 drive connected.
The fatal error was not disconnecting the other HDD, which I usually do. Just got sloppy!
Thanks for the reply.
I was hoping to find a way to get the unallocated partition working, bought a new 3tb drive today to clear J and start from scratch in case this was a non starter.
Anyone have an idea what caused the problem?
You can't "get it working" as is. It's not a partition. It's unallocated space. MBR discs aren't going to recognize 3 TB on a disc--only a little over 2 TB.
You can start over with that disc, initializing it as GPT. As I mentioned in my first post.
Were you able to fix it, and how did you recover the data? I am having the same issue and was not sure what to do. I would have sent you a PM but I have less than 5 posts.
I just registered here to share this thread:
MS hasn't been very helpful, but there is some advice there which may be of use in recovering your data.
try reinstalling the driver!
I had the exact same problem. running a Seagate HDD with 6TB, 2TB C:/ and 4TB for storage
I spent 2 weeks trying out various recovery programs, popping it into a toaster and seeing if I could pull the data off the unallocated storage onto an external, and even booting into a live USB of Lubuntu but nothing was working.
Then I tried running the seagate tool that came with it and it gave me a flag saying that it needed the Virutal Disk Driver to be installed
I installed the driver, gave the partition a letter and presto, all files and the partition were back good as new!
yup, all that effort for 2 weeks when all that happened was that the upgrade from 7 to 10 deleted a driver.
Here's to hoping my experience will help others especially since this board was a top result when search for answers!
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