The message only is displayed at boot time. I dont know how long its already hapening, I use the system only since not so long ago.
But I got a clue here:
The release notes of ES45 V7.3 firmware say (section 6.7) :
There is a small period of time after the system is initialized where some fiber channel disks will not be displayed with a "show device" command. If the system boots during this period the message "waiting for poll to complete" followed by the device name will be displayed while waiting for the device.
(end quote)
So it seems now, that this message is documented and there is no real problem.
Thnx Volker for the reply.
Jan