zpool import failes with cannot import 'testv_msc': one or more devices is currently unavailable - o

Hi guys,
I have a tricky behavior on one of a two-node cluster. Background is the requirement to migrate to a smaller LUN and as Zpools cannot handle smaller LUNs or reduce the number of LUNs online, customer  need to use snapshot and a short offline time for this.
The Zpool was snapshotted cleanly and works flawlessly on the first node, but cannot be imported in the second node

root@gf01sxdb077v:~,$ zpool import testv_msc
root@gf01sxdb077v:~,$ zpool export testv_msc
Works ...

root@gf01sxdb077v:~,$ zpool import -d /dev/dsk testv_msc
root@gf01sxdb077v:~,$ zpool export testv_msc