NW6.5 SP8
After rebuilding RAID5 based on Intel SATA controller (hardware) after scan for new devices i got info:
Volume "Backup1" in group 0 contains invalid superblock headers, status 24867. Run Verify

No possibility to reinitialize device - Uses 0, Free 0 - F3 - init - no changes.

Probably departition still exist - but Netware is not abble to repair them.

What to do (deleting device and recreate it s always an option ;)).