Upgraded the Cluster to version 3.6 from 3.4, and we lost all network shares on a volume.
These were not shares through the "Polyserve file sharing" components, but standard NT / Windows shares on a Polyserve volume. [ We do not have the file sharing components, only the database ].
Since there were only 3 shares it was not worth creating a ticket, as investigating root cause on this one-time event (the upgrade) is too much effort. We just recreated the UNC shares.
I did send a note to the Polyserve HP Support, so they could forward to the engineering team.
Note: These shares were lost before the upgrade of the dynamic volumes from 3.4 to 3.6, as obviously when you destroy a 3.4 volume and rebuild it as 3.6 you will loose UNC (non polyserve shares).