Vmware tools installed the pvscsi library. But does not automatically reconfigure the boot/kernel to use it. Here is a good web page that explains the steps to remake the initrd. Once you have done that under settings in the vSphere Client change the SCSI controller setting to Paravirtual. I think that the pvscsi lib will be included in a forth coming linux kernel tree, which will make having to add this manually, obsolete. Not sure when that will be. I wish VMware would automate this as part of the install or P2V process. http://vmadmin.nt.com.au/?p=28 -Mike -----Original Message----- From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf Of Les Mikesell Sent: Friday, February 05, 2010 1:36 PM To: centos at centos.org Subject: Re: [CentOS] VMWare ESXi & CentOS5.4 On 2/5/2010 12:25 PM, Michael Dross wrote: > I have recently installed ESXi4 on a new HP DL380 G6 with 12GB of memory. > I am running CentOS 5.4 and CentOS 4.8. A few things I have learned. > > First, for best I/O performance you should use the Vmware Paravirtualized > storage controller driver. It's a little bit of a hassle setting it up. > You just have to remake the initrd file. This will give about 10% better > disk I/O than using the other emulated controllers. Does this happen by itself if you've installed vmware tools in the guest and then get a kernel update that triggers an initrd rebuild or do you have to do something to specify the right module to include? -- Les Mikesell lesmikesell at gmail.com _______________________________________________ CentOS mailing list CentOS at centos.org http://lists.centos.org/mailman/listinfo/centos