dk for z/lvm volumes?

[Staffan Thomén <duck%shangtai.net@localhost>]

Hey,

I recently wanted to set up backup of a (snapshot of a) zvol that I had 
exported via iscsi to a windows machine, and got stumped because windows 
didn't just create a ntfs filesystem on the volume, it also added a partition 
table and so mount_ntfs and ntfs-3g couldn't find the filesystem on it.

I couldn't coax dkctl to create dk devices for the gpt on the volume, and 
dkctl seems like a bit of a mismatch for creating arbitrary dk:s anyway as it 
seems mostly directed at bare drives (cache settings etc).

My other thought was using vnconfig, but that doesn't seem like the right tool 
either.

This left me with a couple of questions, is dk the right fit for getting at 
partitions on logical volumes? Could a tool be written that does this so we 
wouldn't have to load down dkctl with features that aren't really related to 
disks or is dk* not the right device and a new driver is needed?  Have I just 
missted something?

Thoughts?

Staffan