On Wed, Feb 18, 2015 at 9:25 PM, John R Pierce <pierce at hogranch.com> wrote: > disks -> partition(s) -> mdraid devices -> PVs -> VG -> LV -> file system. > phew. You might be a candidate for LVM integrated raid. It uses the md kernel code on the backend, but it's all LVM tools to create, manage and monitor. The raid level is defined per LV, instead of all LV's in a VG inheriting the underlying raid. It supports all levels of raid including 5/6. It doesn't quite have all the features of mdadm. But the flexibility it offers for use cases where LV's are often being created and destroyed and different redundancy levels/types are desired, it's neat. And eventually, one of these years, Btrfs. That is so much simpler to create and manage. disk>no partition>Btrfsraid>subvolumes instead of partitions It doesn't have all the features of mdadm or lvm, especially when it comes to VM images. But for general purpose data, it's nice. It'll use different sized drives in a raid56, no fuss, no having to tell it how to do that. Online addition of yet another (unlike sized) drive and it just starts using it with a single 'btrfs device add' command. No restripe/resilver needed. -- Chris Murphy