Il 2020-07-14 18:05 David Teigland ha scritto:
On Mon, Jul 13, 2020 at 04:34:52PM +0200, Janne Heß wrote:
However some of my systems are single-disk systems. For those, RAIDs
are
not possible so I was thinking if LVM has some support for single-PV
setups with parity on the same PV.
Hi,
We didn't include integrity+linear because we didn't see much value in
it,
since it would require going to backups in case of an integrity
failure.
dm-integrity will detect but not fix bit rot.
Hi, I really think error detection has value by itself.
So I would suggest implementing it.
So is there any way to get a parity setup with the current state of
LVM?
I was thinking of a RAID-4 with one PV but the current tooling (more
specifically lvcreate) doesn't let me do that.
It's not currently possible. We had an implementation for this we
could
bring back if there is enough interest, so we'd like to hear more about
how this would be useful for you and others.
For this feature (parity+linear) I don't see much value: if a single
physical devices fails hard, all bet of recovery are off. However having
it can sometime be useful so, if implementing/maintenance cost are low,
why not?
Thanks.
--
Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it
email: g.danti@xxxxxxxxxx - info@xxxxxxxxxx
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