This morning the server was a blue screen of death (netware version) with multiple abends. The only process running at the time was Arcserve backup ver 11 r1. The abend log listed the reason for the abend:

Abend 2 on P00: Server-5.70.05-0: SubAllocFreeSectors given invalid FAT chain end that was already free.

Additional Information:
The NetWare OS detected a problem with the system while executing a process owned by FILESYS.NLM. It may be the source of the problem or there may have been a memory corruption.

Can thoughts on this and a troubleshooting path to find and fix the problem?

Thank you