After running a web performance load test, I noticed that my SharePoint farm (consisting of 2WFEs, 1DB, 1Domain Controller) has high Disk I/O, what can be the cause for this and what I can do to lower it? Both WFEs had the following key performance metrics: CPu ~ 20%, Memory ~ 15%, Disk ~ 95%, and Network Out ~ 45.3 Mbps. Thank you!

Could you please tell us more detail about your web performace load test. I guess the disk I/O on the WFEs is caused by the BLOB cache. Please read what follows for detail: http://blogs.msdn.com/b/selvagan/archive/2008/12/11/blobcache-moss.aspx http://download.microsoft.com/download/7/F/0/7F069D0B-B6BD-4692-868B-E8555BB72445/SharePointServerCachesPerformance.docx