after we upgraded a OES1 Server (fully patched) to OES2 SP1, the NSS Volume was kind of gone. We were not able to do any operations on the NSS volume, not with iManager and not with nssmu. nssmu said there was no volume at all, iManager showed pool / volume but no mount was possible.
The NSS Volume was on a seperate physical disk, no EVMS.
In the end, we had to remove the partition and to recreate partition / Pool and volume.

Does anyone know if this is "standard" and will similar things happen when upgrading OES2 servers with SP1?

We do have OES2 servers are now reluctant/worried to upgrade to SP1.