Connecting Two Linodes to Block Storage

Am I correct in understanding I can only connect a block storage to one linode at a time?

If so, am I equally correct that I can accomplish this by running a "nanode" i.e. the cheapest Linode and connect the block storage volume to it and then access the block storage by NFS-mounting the nanode in the two linodes I originally wanted to give access to the block storage?

If so, why do you make it so complicated to accomplish something I would think a lot of people setting up redundancy in their system like to do from the start i.e. be able to have a block storage as filesystem that one or many application servers can access?

I mean, this way I have to keep a nanode around just acting relay between Block Storage and the other linodes that want to access the block storage. I'm probably missing something here so please do enlighten me.

Thanks.