Re: LVM RAID vs LVM over MD

[Nicholas Geovanis <nickgeovanis@gmail.com>]

I'd like to make sure I'm taking away the right thing from this conversation.

It seems we have high-level recommendations _not_ to use LVM RAID1.

Not just over MD, simply don't use it at all. Do I get that right?

On Mon, Dec 5, 2016 at 4:25 AM, Jonathan Dowland <jmtd@debian.org> wrote:

On Sat, Dec 03, 2016 at 07:39:37PM +0100, Kamil Jońca wrote:
> So far I used lvm with raid1 device as PV.
>
> Recently I have to extend my VG
> (https://lists.debian.org/debian-user/2016/11/msg00909.html)
>
> and I read some about lvm.
> If I understand correctly, LVM have builtin RAID1 functionality.
> And I wonder about migrating
> lvm over md --> (lvm with raid1) over physical hard drive partitions.
>
>
> Any cons?

MD is older, has had more development and is generally considered to be
more robust. I would always choose to do RAID with MD, directly on the
disks, and put LVM on top of the MD virtual block devices.

--
Jonathan Dowland
Please do not CC me, I am subscribed to the list.