NetApp; Run from this Vendor.
We purchased a filer 6 months ago and have been running 8.01P5 in 7-mode. All I can say is if you're thinking about purchasing a NetApp system, don't, it's quicker and cheaper to just pound yourself in the head with a brick. It's been one problem after another. One weekend, a couple months after installation, the filer failed completely. No recent changes, no upgrade going on, nothing. It just crashed. And 3 or 4 times we've had email alerts that one of the two controllers had failed when hadn't (we're setup in an active/active or HA pair configuration) NetApp software that just doesn't work and support calls that stay open for weeks.
Their customer support seems intent on either proving you're setup is not a validated hardware/software configuration and if that fails they try to sell you professional services. In 12 years of working as a UNIX admin, their software support is the worst I've experience. This is based on working with numerous calls, not just one bad experience.