I'm thinking of buying a HP Proliant microserver to replace an old dusty laptop which I now use as a home server and a Netgear ReadyNASDuo which is not raided at the moment.
I want the server to replace my NAS and home server, so here some questions:
From what I understand I can't hot-swap, right?
I was thinking of having five drives in total but slowly upgrading it. So I was going to start with two drives (one drive to drive the OS, and the other to have as future RAID). But since I want to plan ahead I would like to have RAID 5 (which means more storage than raid 1, when 4 drives are inserted, while everything is still backed up, right?).
Do I have to have 3 drives from the start to have a RAID 5?, or can I use/change to RAID 5 when three drives are added without actually formatting a drive?
I've looked if this is doable but did not find any info on it.
Can I even format one drive as a RAID and then add other drives?, or must I start with 4 drives from the start?
And any other tips on doing software raid on ubuntu would be greatly appreciated.