On 4/1/07, Morten Torstensen <morten at mortent.org> wrote: > John R Pierce wrote: > > In IBM AIX (where LVM kinda came from), the soft raid and volume > > management is rather tightly integrated, but in linux, its seperate. > > There is not RAID in AIX LVM, just mirroring (well, stripes too but > never mind that). Since you just map Logical Partitions to multiple > Physical Partitions (same as Physical Extents, PE, in the linux > implementation), it is easy to duplicate logical volumes to different > physical volumes. You can do this online of course, as it is all below > the filesystem/logical volume level. Migrating from one SAN to another, > one disk to another, adding disks, splitting disks, removing disks. All > is done in the LVM. As it should be. > > The linux approach is much more primitive. Too bad the linux lvm guys > used HP-UX LVM as their reference. Used to manage HP/UX systems (eons ago) and raid was integrated into their LVM implementation also. Cheers..james