I have a customer who uses a rack-mounted <a href="http://go.iomega.com/en-us/products/network-storage-rack/ix12-300r/ix12-300r/?partner=4760">Iomega ix12-300r</a> NAS unit to provide NFS storage to their ESXi 4.1 hosts.  I blogged earlier about some of the issues encountered setting this up <a href="http://blogs.egroup.jasonmangone.com/?p=2762">here</a> and <a href="http://blogs.egroup.jasonmangone.com/?p=3192">here</a>.  One important step we took to stabilize this environment was to upgrade the firmware on both the chassis and on the drives themselves. It can be difficult to find accurate information on Iomega's web site to do this.  It's important to upgrade the chassis firmware first. Here are links to the specific <a href="I have a customer who uses a rack-mounted Iomega ix12-300r NAS unit to provide NFS storage to their ESXi 4.1 hosts.  I blogged earlier about some of the issues encountered setting this up here and here.  One important step we took to stabilize this environment was to upgrade the firmware on both the chassis and on the drives themselves. It can be difficult to find accurate information on Iomega's web site to do this.  It's important to upgrade the chassis firmware first. Here are links to the specific chassis firmware and drive firmware support installation instructions on Iomega's web site. If you download the files, prepare USB media for the drive firmware in advance, and carefully follow the instructions, the actual upgrades are fairly quick and easy.">chassis firmware</a> and <a href="https://iomega-na-en.custhelp.com/app/answers/detail/a_id/24491/related/1/session/L2F2LzEvdGltZS8xMjk3MTkzNDAxL3NpZC9qT2pMcTdtaw%3D%3D">drive firmware</a> support installation instructions on Iomega's web site. If you download the files, prepare USB media for the drive firmware in advance, and carefully follow the instructions, the actual upgrades are fairly quick and easy.