Hi James,
based on SAP Notes I found out there was different number of data volumes and log volumes present on the server than in configuration. Command param_getvolsall showed 13 data volumes and 1 log volume but there were 21 data volumes and 2 log volumes on server. It means that by restore_param i "took away" data volumes from number 14. I reverted it as I described above.
I have opened OSS message to SAP and they solved the issue. The cause was that parameters MirroredLogVolumeName002 and LogVolumeName002 were identical. So I set parameter MirroredLogVolumeName002 to different path than LogVolumeName002.
Thanks a lot for help!
Ivana