I'd try running filemon to determine what task is causing the I/O. Also as a hunch I'd check your AV. Matthew Shrewsbury Network Manager -----Original Message----- From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Michael Boggan Sent: Tuesday, December 12, 2006 10:19 AM To: thin list Subject: [THIN] Disk I/O problem We are in the process of doing a proof of concept with PS4 and new hardware, etc. We have 3 PS4 servers built. 1 as the DC, 1 as a published desktop server and 1 as the published applications server. Users login to a published desktop and get there icons via the PNAgent running for each desktop. The applications are all published from the 3rd server. We have roaming profiles and the desktop and application data folders are mapped to individual folders on the network so that they follow them around. We are having problems with disk writes on the desktop server. For some reason the disk I/O is going crazy on that server alone. SO much so that the server lags tremendously. ANy have any idea why this might be happening? If anyone knows of a way to determine what is actually being written too, that would help as well. We have tried NetIQ and other monitors but cannot find anything that tells us what is actually being written too on the disk. Thanks, Michael Boggan ________________________________ Search from any Web page with powerful protection. Get the FREE Windows Live Toolbar Today! Try it now! <http://get.live.com/toolbar/overview>