Have looked at your previous postings to find a description of server set up. Hosted with a provider who is managing server for you and in same posting said 1TB mirrored storage ... on Linux.
On that platform one doesn't really have a 'drive' but partitions and attached storage devices. So can you give a description of this removal of the 'extra harddisk'?
So before assuming the worst, seek more information ... for both moodle issues you are not facing.
Check your moodle config.php and path to moodledata as well as any other config lines that would reference storage devices (paths).
Can you turn on debugging? Does that show anything when first calling up those trouble areas you are now facing?
Can you check your servers web service error logs?
Have you tried using browser console when accessing both of the trouble areas to see what your browser might say?