On my 3 NetWare 4.11 servers there are no any OS patches installed. Some NLMs are out of date and I would like to install intraNetWare Support Pack. Version 4.0 is the latest one (as far as I know) but I have heard that it can cause some troubles with ARCserve 6.1 running (which I have) and also that the Loader.exe in Support Pack v.4 can cause the server to abend. Are these concerns reasonable? What should I do - install intraNetWare Support Pack v.3a instead?
Other question is: are ds.nlm and dsrepair.nlm included in iwsp4a.exe or should I update them using ds411h.exe?