As posted on VMwareInfo.com:
Today my NAS emailed me. 
It was pretty great. A short little reminder that a new update to the firmware was now available. I was lucky enough to receive this in the mail from Chad Sakac around Christmas time and it has been great to work with in my home environment. I currently have 2 ESX servers connected to it via NFS and all the VMs perform like champs (for my home use). No complaints from the wife or kids! 
(Thanks again for the NAS Chad!).
Back to the email. A quick jump to the web based dashboard of the NAS and there is a nice and easy link to download the new firmware.
A quick shutdown of the Virtual Machines running and I was off to the races on my update. I’ve said it before but if you are looking for a great inexpensive addition to your Home Lab, check out the IX4.
Literally a couple of clicks later and my firmware was updated. Check out the release notes below for information on the update.
General Description: This firmware update provides performance improvements for your StorCenter ix4-200d. Iomega recommends this update for all units.
What’s New:
Version 2.1.30.8298
- Improved folder permissions, including AFP
- Fixed iSCSI segment length
- Improved Video Surveillance integration
- Fixed minor security issue with external USB devices
- Improved Active Directory integration
- Improved content indexing performance
- Fixed an issue with RAID arrays
- Improved performance when discovering multiple devices on network
- Restricts thumbnails to files less than 15 megapixels