According to HP, a small percentage of HP MediaSmart EX470/EX475 comes with redundant sensors that is showing false temperature readings. HP is providing a software hot-fix for the unit equipped with the faulty sensors. HP will not make any hardware repair on the affected units.
Based HP Technical Support:
The attached software patch disables the notification of the redundant sensor and ensures that you will not receive false hardware alerts in the future. The key temperature reading for your Mediasmart Server is the CPU reading. This sensor is the focus of the temperature control design and is functioning properly, so you can be assured that your HP MediaSmart Server is operating as designed.
The software patch is available only through HP Technical Support, and is not available through HP Web-Site.
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According to HP Technical Support, RAM upgrade will void MediaSmart warranty. To be honest, this is not a good move by HP. The system comes with a mere 512MB RAM, which is not enough for any real server task. Try installing McAfee Total Protection Service add-in, and the Windows Home Server’s performance will turn into a crawl.
Crucial is selling compatible RAM upgrade for HP MediaSmart EX470/EX475, unfortunately HP Warranty Policy does not support such upgrade.