Thanks for your input Karl. I tried this net use \\node2\c$ <file:///\\node2\c$> (while logged in node1) it worked but when is trying with net use \\node1\c$ <file:///\\node1\c$> (being on node1) it ask for user/pass and I provided the administrator credentials which failed with System Error 86. ---------------------------------------------------- With best regards Arvind Kumar ________________________________ From: Karl Arao [mailto:karlarao@xxxxxxxxx] Sent: Thursday, December 09, 2010 9:03 AM To: Arvind Kumar (IT-SIS-UIF) Cc: oracle-l@xxxxxxxxxxxxx Subject: Re: Windows 2008 n 11gR1 clusterware Try repeating the net use commands .... and it should come out fine... D:\clusterware>net use \\winrac11g2\c$ Local name Remote name \\winrac11g2\c$ Resource type Disk Status OK # Opens 0 # Connections 1 The command completed successfully. D:\clusterware> D:\clusterware>net use \\winrac11g1\c$ Local name Remote name \\winrac11g1\c$ Resource type Disk Status OK # Opens 0 # Connections 1 The command completed successfully. Then... C:\OracleInstallers\clusterware>runcluvfy.bat stage -pre crsinst -n host1,host2 -r 11gR1 -verbose Also you may want to read on Oracle RAC Clusterware Installation on Windows Commonly Missed / Misunderstood Prerequisites (Doc ID 388730.1) -- Karl Arao karlarao.wordpress.com karlarao.tiddlyspot.com