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Re: access LVM logical volume as disk?
On 11/4/25 15:30, Robert Elz wrote:
Date: Tue, 4 Nov 2025 23:12:05 -0000 (UTC)
From: mlelstv%serpens.de@localhost (Michael van Elst)
Message-ID: <10ee185$ajm1ドル%serpens.de@localhost>
| You can create a ccd device on top of a LV.
What's the benefit of doing that (assuming just one member of the ccd) ?
If the object /dev/mapper/vg0-lvpbulk works for gpt, and ccd, then isn't
that already a device, at least for most practical purposes ?
Wouldn't (if needed, that is, if it doesn't happen already)
dkctl /dev/mapper/vg0-lvpbulk makewedges
work to access the partitions inside a LV containing GPT partitioning?
Note, I know nothing at all about LVM, treat all of this as questions
from a curious bystander.
Unfortunately, no - the lvm devices (similar to zvols in the ZFS world)
don't support the necessary ioctls:
# dkctl /dev/mapper/rvg0-ubnt makewedges
dkctl: /dev/mapper/rvg0-ubnt: makewedges: Inappropriate ioctl for device
I agree that it would probably be more useful if they did, but here we are.
+j
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