[Swlug] using lvm for mirror

[Matt Willsher]

You can create a separate mirror partition and add as a pv to an lvm vg,
growing the available space.

You would get more control running lvm to do the raid too, and from what I
saw if it a few years ago it looks robust, but I’ve never used it nor ever
seen it used in earnest.

I’ve only used md only on boot and swap and lvm on top for all other cases
due to the flexibility in sizing and scaling it gives.

Do be aware that software raid isn’t always easy to recover from and data
loss can still occur. In work its always been hardware raid where we used
it. As I’m sure you know, Raid is not a replacement for backups.


On Wed, 1 Dec 2021 at 22:28, bascule via Swlug <swlug at mailman.lug.org.uk>
wrote:

> Thanks guys,
> I'll think about which route i want to go, since i only want to mirror the
> partition for the win10 vm as all my linux stuff is in fact backed up over
> the
> network.  the mdraid seems simpler i think as long as both routes allow a
> mirrored partition loss to not result in loss of data and it being easy to
> get
> the mirror back with new hardware.  either way would leave me with a fixed
> size windows volume, since any other space on either drive would not be
> mirrored - if i understand this correctly.  unless it would be possible at
> a
> later date to create a second mirrored set of lvm volumes and add them to
> the
> first?
>
> bascule
>
>
>
> --
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