On 20/05/18 10:05, Andrew Greig wrote:
Drives are in and Ubuntu 18.04 is installing, I am offered an LVM option will that mess with RAID?
No. Typically you would use both, LVM on top of mdadm. (LVM does offer its own mirroring, but it's really just meant for cloning volumes.)
One other thing, will choosing btrfs orZFS just utilise the matched drives as a RAID pair?
Not unless you configure it that way.
If I go XFS, as my file system for all drives, then will I need the install to complete, then run mdadm to set the RAID?
If you want to set up RAID and LVM at install time, you need to use the Ubuntu "server" install image. If you're using the "desktop" image, you will have to set up RAID and LVM after the initial install. Since you're planning to put the base system on a single non-RAID drive (that's also what I did, using an SDD) you can easily just install to the single drive first, then add the mdadm and LVM packages and set the extra drives up the way you want. Hope that helps, Andrew