Hello Guillaume

Regarding Open File Managers you should check out http://www.stbernard.com/ 
they provide solutions for certified for TSM, NetWare 6 is for the time being 
not supported - but will be in a month or two. Is it regarding GroupWise 6, 
then I'm sorry to tell you that the GWTSA.NLM isn't supported by TSM - have 
asked IBM for this, but haven't received any answers on the upcoming of such a 
support.

Regarding ordinary backup, just remember to patch your server with TSA5UP9 - or 
else you might get some trouble.

Regarding backup of cluster, you might need to look at the following TID:
 
 http://support.novell.com/cgi-bin/search/searchtid.cgi?/10070753.htm

Good luck ;-)

Flemming Hougaard