Hi Victor,
This could be an issue with the non-bootable drive as it does not show up after running check disk as the drive would normally get remounted when you restart the computer.
Please assist me with the following information related to this issue:
Did you check for the issue with the drive with a different computer?
Dismounts the volume is to be checked before you run the scan. If you're checking a nonsystem volume, use this option because it guarantees that the drive will not be accessed by other programs in the system during the check process. If you don't pass this parameter and you try to run chkdsk on a volume that's mounted, you'll be asked if you want to dismount it first. A volume that the system is using, such as the drive with the /Windows directory, can't be dismounted. Instead, you'll be asked if you want to run the disk check at the next reboot.
First of all, let’s check if you are able to find the drive recognized when you unplug and plug it again.
Follow the methods and check if it helps:
Method 1:
Unplug and then reconnect the drive and check if the drive is getting recognized and shows up under Disk Management.
Method 2:
Run the diskpart command in Command Prompt and check if it shows the disk in the list of disks. Follow the steps:
a) Press Start menu and type “cmd”.
b) Right Click on Command Prompt and select “Run as administrator”.
c) Type the commands and hit Enter after each:
Diskpart
List disk
d) Check if the disk shows up under the list of the disks connected to the computer.
If not, proceed to the next method.
Method 3:
I would suggest you to connect the disk to a different computer and check if it is getting recognized and the drive shows up under Disk Management.
Please let us know about the status of this issue. We will be happy to assist you further.