I hope this is the right place to post this question.
I've been searching for a while, to find an answer to this. I'm trying to find out what is a better approach for our household.
- Buy two NAS devices, and have the main one backup to the other one every night. Both will have a 3TB hard drive.
- Get one NAS device, with two bays and RAID-1. And use two 3TB hard drives in them.
Both approaches result in 3TB being available for storage. The first prevents most data from being lost (a maximum of 24 hours can be lost if the main one crashes). The latter (in most cases) should avoid any data being lost altogether.
As far as I'm concerned, RAID-1 is the way to go. Because of these reasons:
- Faster (concurrent) access to data.
- More secure on drive failure.
- Easier to manage (only one device, not two)
- Easier integration from any device (only 1 IP address, no need to switch in order to read from the other one)
However, someone I'm having a discussion with about this subject thinks the two NAS devices approach is better. A friend recommended it to him. His only argument is that when one of the NAS devices dies, the other one can take over all functionality.
Note that in the case of having two NAS devices, they'll not be more secure from for example the house burning down. So location isn't an argument here.
Does either solution bring complications when it comes to compatibility. Such as playing from a PC, a media players, internet TV, etc.?
What are the pros and cons of either scenario? And which is the recommended one?