I have a OES SP1 Linux server that was initially installed with NSS and one
volume in the pool. The initial volume works but now when I try to add a
new volume through Imanager I get

Could not update eDirectory for IMAGES. Unknown error with error code: -220.

as the last step of creating the volume.

Using the udpate eDirectory button on the main volume listing gives the
save error. The new volume does show up on the nss volumes list but it is
unusable from the client. This seems to be an edir problem but I cant
figure out how to fix it.