On Sat, 2007-03-31 at 22:14 -0700, John R Pierce wrote: > Cen Tos wrote: > > I've been reading the RHEL 5 manual/guide linked from centos, and the > > idea of LVM with expandable partitions seems like a great idea (yes > > duh why else would it exist if not?). Although the documentation shows > > a screenshot of how the final setup would look like with LVM & RAID > > together, it doesn't actually gives the step. > > > > 1. Am I correct in thinking it should be done in this way > > - setup Softraid > > - setup LVM on the raid partitions > > > > > > Secondly, LVM allows expansion of the LVM group when we add a new > > drive. But with softraid, how will this happen? Searching around does > > not turn up any guide on this. Am I correct in thinking I must always > > add new drives in pairs (for Raid 1), create a new softraid partition > > then assign this new partition to the LVM group? > > yup, pretty much thats how it works. > > In IBM AIX (where LVM kinda came from), the soft raid and volume > management is rather tightly integrated, but in linux, its seperate. I guess you've got the gist of the matter right - setup software raid - setup LVM on the software raid paritions and if you need to increase space thereafter - add in the physical drives - setup new software raid - add these /dev/mdX into LVM (pvcreate, vgextend etc.)