Comment 3 for bug 1922110

> Those nodes are redeployed over and over again during our tests and we encountered this only once so far. Does it help?

Not really. The charm detected a non-pristine device. There are two possibilities:

1. It was non-pristine so the charm did the right thing. i.e. the block device isn't pristine.
2. The charm made a mistake; the block device is pristine, but it wasn't correctly detected as such.

In order to resolve which option is the correct one, we need to establish IF the device was pristine. i.e look at the first block and see if it has any data in it.