[linux-lvm] pvcreate error 241 for loopback devices

[Michael Marxmeier]

Forwarded message from 2b at cheerful.com ...

-------- Original Message --------
From: Scott Sexton & David Lewis <2b at cheerful.com>
Subject: pvcreate error 241 for loopback devices

I'm very sorry for this question as the answer must be obvious.

While trying to use the loopback device with files for testing lvm,
pvcreate is giving me this
error -241 getting size of physical volume "/dev/loop0".

Do I need something besides lvm to use loopback devices with it?