I encountered an weird bug last week. It started with an abend. The server didn't reboot correctly. It said server.exe "file not found"?

I looked in the directory and it wasn't there. As well as all the files in that directory!! Drivers and NLS directories where there and with their files.

I can't figure this one out?

I have 10 netware servers and 5 out them had this problem. All are nw 6.5 sp5. Four of them are connected to the SAN. For now I copied the nwserver to a backup oone, just in case it happens again.

Anyone seen this before? I don't suspect foul play, should I?