The main thing I am unsure about is the RAID1 thing. Is this a good idea? How do I set it up? I imagine it won't be quite as easy as telling him to use some space on sda to mirror the stuff that ...

I would like to move from extX partitions to something modern like LVM, btrfs or ZFS. Server uses GNU/Linux, but I see that ZFS is popular right now. First of all, is it ok to use LVM with ZFS? I ...