Feature: Able to create a storage on a encrypted drive

[JohnGuan]

Base on @vitor-mariano #373

Is your idea related to a problem? Please describe:

I have a clean encrypted ext4 partition. When I select the drive to create a storage, it doesn't show up and displays no errors. So if I format the partition to ext4 unencrypted, it works fine.

I worked around the problem by manually changing on /etc/fstab the mounting point of my partition to /DATA/MyStorageName. It doesn't show in the storage inside CasaOS, but at least the folder can be accessible by any CasaOS application.

Describe the solution you'd like:

• It should be possible to use an encrypted partition.

Describe alternatives you've considered:

• ...

Additional context

I would say the pros and cons are the same of full-disk encryption for the OS: protect drive against unauthorized physical access.

Let's imagine a few scenarios where it's useful. I think it's okay to keep the drive unencrypted for users who build their own server and have it installed at home, and will never get rid of their storage drives. Although (probably) most of the users may send their computers to technical assistance, sell (without formating properly), lose or even have their storage drives stolen. In all those cases, the data inside may be leaked. It's a problem, specially if the user has applications like Nextcloud, Jellyfin, Syncthing, where they will certainly contain sensitive personal or business data.

Just a quick test, I plugged my hard drive on another computer, and I got all my private files accessible.

The only cons I can imagine is that it makes harder to recover the drive in case of fail.

In my opinion this feature will convince the most concerned users and make CasaOS more popular.