Windows 10: Unable to Initialize Disk

I have a 4TB harddrive. I was using it in a storage pool with another 4TB harddrive. I've moved the disks around and no longer want them in a pool. Unfortunately, one of the 4TB drives shows up as the old 8TB pool in Disk Management. I'm unable to initialize, format or delete the volume.

In Storage Spaces, where I would make or delete the pools, It shows that there's something wrong, but it doesn't show the drive.

It doesn't show up at all in diskpart > list disk

I've moved the drive over to another windows 10 machine with the same results.

Any ideas?

- - - Updated - - -

Update, it now shows up in diskpart but as the 8TB drive.

:)

 

SSD not initialized and unable to initialize

There could be several reasons due to which ‘Disk Unknown Not Initialized’ error message may occur, which are mentioned as following:
Corrupt/ Incompatible/Outdated Driver, MBR Corruption, Missing or lost partition, Bad Sectors in hard drive, Corrupt File System etc. To solve this problem we apply some fundamental manual steps like: update the device driver,
Rebuild the MBR boot, initialized disk, assign a drive letter, Run CHKDSK command and Run diskpart utility.

To initialized the disk go to Disk management > and locate the drive that not initialized > the drive will show unallocated. > select unallocated disk > Right click on it > click initialized disk > select
between GPT > Click OK.

Once the process is done, you will redirected to main windows and check you can access it or not.

 

SSD not initialized and unable to initialize

I have 3 disks on my desktop : 1 M.2 disk (boot disk) , 1 SSD drive and 1 HDD drive . Everything was working well until yesterday i was unable to access some files on the SSD drive . After restarting the computer the SSD drive doesn't appeared anymore
.

In disk management appears as "Disk 1 - Unknown - Not initialized" . When i click to initialize i got the error "A device which does not exist was specified." . What can be the cause of this ? How can i initialize the drive ?

 

Cannot Format HD


Need to initialize it as GPT disk type with HD > 2TB:
From Admin command prompt:

1. diskpart
2. list disk =====> Take a note of disk # for the 4TB HD
3. select disk # ====> From step 2
4. clean
5. exit

Open Disk Management and initialize the disk as GPT, create simple then format.