Perhaps try clearing your web browser cache, closing your web browser and reopening the web admin page. That would force the cache to be flushed. The cache of the web admin page would be flushed automatically eventually but your browser could take a while to do it automatically.
Useful links: Sending Logs|My ReadyNAS Gear|FAQ|Hardware Compatibility List|Docs: Setup Guide, Manual|Downloads|Unofficial Tips|GPL|MDGM on Twitter|MDGM's Unofficial Guides
NB: A ReadyNas is not an excuse not to have a backup. Fire, theft, multiple disk failures, other hardware failure, floods, user negligence etc. can all result in loss of data.
How to contact NETGEAR Technical Support | Australia: 1300 361 254 / Other Numbers|Online Submission
Unofficial Guide for Moving from Sparc ReadyNAS to x86 ReadyNAS|Using Gmail with the ReadyNAS|XRAID Volume Size Calculator