Hi Li Shan, I'm afraid I don't know the reasoning behind the parameters you have listed. I may help to know that I am only using these parameters with VMware 5.0 which allow RAC on my external USB2 drive to run just fine. disk.locking = "false" diskLib.dataCacheMaxSize = "0" HTH Adrian _____ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of LiShan Cheng Sent: 26 February 2006 19:28 To: oracle-l Subject: vmware vmx parameters Hi I am installing a 2 node 10gR2 RAC in my labtop using vmware. I have come across some doubts Setup: ------------------------------------------- Host OS: Windows XP PRO SP2 Guest OS: CentOS 4.2 VMWare Workstations 5.0 I am using a external USB Drive for all this setup, both Virtual Machines and the shared storage. http://www.seagate.com/products/retail/portable/index.html I have questions regarding vmware parameters, to start with does anyone know what does these paraneters do? (I understand they are used for Shared Storage). The best list I have found is here: http://dev.remotenetworktechnology.com/vmware/vmxfiles.htm diskLib.dataCacheMaxSize = "0" diskLib.dataCacheMaxReadAheadSize = "0" diskLib.dataCacheMinReadAheadSize = "0" diskLib.dataCachePageSize = "4096" diskLib.maxUnsyncedWrites = "0" scsi1.present = "TRUE" scsi1.sharedBus = "virtual" scsi1.virtualDev = "lsilogic" I cant find anything in Vmware documentation which explains about these parameters. Since I am going to use them I would like to know at least what am I doing :-) Regards LSC