I have a 2TB and a 1.5 TB hard drive. My ultimate goal is that I have a partition of 1.5 TB which is mirrored to both disks, so that I won't lose data if one hard disk crashes. Of course I'd like to be able to use the remaining 500 GB as well, but I don't need it mirrored. This is only about data, the system is on another harddisk.
I'm not sure which is the best way to achieve that. I have thought of the following things:
Raid 1 (although I'm not sure whether I could still use the remaining 500 GB then). Also I read that the partitions should be exactly the same size..
set up some rsync (not very convenient)
use LVM (although I'm not sure what to with that exactly)
My goal is to a) have redundancy so I won't lose data if one hd crashes and b) ideally gaining some performance if possible using e.g. raid
Any advice is appreciated!