I'm currently building a backup server for a few of the machines in the office. I plan to run ubuntu 10.04 LTS on it.
My current setup is:
2 x 1TB disks in software RAID 1 configuration
2 x 2TB disks in software RAID 1 configuration
My original idea had been to mount the filesystem on the 1TB Raid array and use the 2TB raid array for storage. However, this will leave a large chunk of the 1TB array unused and doesn't seem to be very efficient.
My question is, can I run LVM over the top of both arrays to arrive at a 3TB volume?
My fear with this is that I obviously need the volume to be bootable in case of a drive failing. Can anyone point me in the right direction and give some advice on whether it's possible, or any best-practice considerations? I'm a little overwhelmed with the information out there.