There are some not-identical disk of various capacities that I want to combine (somehow).
Since there are no duplicate models, I can't use raid between none of them.
Is there a way to use them efficiently while being safe?
What I have in mind is a software that will use them as if it were Raid-5 or something. I really don't care about max speed. I want in the end to have as less logical drives as possible. Also, I don't mind spending some money on hardware, if needed.