I therefore have a secondary internal hard drive used as storage on an Ubuntu machine. I have performed a new installation on the boot drive with Server 2012R2 and the secondary drive indicates the disk management capability, but the file system is empty.
When running diskpart, the list of drive partitions indicates that the partition type is Unknown. Running "convert mbr" in diskpart returns the error "the specified disk is not convertible".
How can I change the file format to NTFS without data loss?