My question is about encrypting a remote Time Machine backup on a Drobo 5D.
- Mac mini 2012, Drobo 5D (connceted via Tunderbolt)
- Mavericks Server
- Services: Time Machine Services, File Sharing, Caching Server
Before I begin:
Local Time Machine encryption to a locally connected Drobo drive (Thunderbolt or USB) is known to be fatal, because Drobo works with a virtual disk layer, pretending to the OS, that the maximum drive space is larger than the acutal disk array installed. That way, the volume can grow in size later on. If you select a locally connected Drobo as your Time Machine backup, OS X will try to encrypt the complete volume, which will corrupt the volume because of the virtualization going on there.
My question: is this also true on Time Machine Server service?
I have my Mac running OS X Server (10.9) with a 5D connected via Thunderbolt as the redundant data volume. The server provides Time Machine services to my clients. Clients are backing up via WiFi to the server. If a client is performing a Time Machine backup on the server, the server actually creates a Sparsebundle, instead of writing the data directly to the share.
So my thought is: if the remote Time Machine volume is actually a sparsebundle, shouldn't it then be possible to also enable encryption on it, as the encryption would only be applied to the sparse bundle instead of the complete Drobo volume?
Any experiences in this field would be most welcome!
PS: I know that this question would rather belong to a Drobo forum, however, I would like to double-check this question in this forum as well.