I know this isn't a support channel, but Netapp's not been useful at all, so what the heck:

I have an F630 that's run well enough for five months. On Sunday we upgraded our filer to 5.1.2 from 5.0.1d4 at the suggestion of our Netapp SE.

Since then, it's come grinding to a halt each day. NFS access starts getting really slow, and eventually completely unresponsive. Network activity is not high. sysstat shows that cpu, disk, and net are all getting lower and lower as clients start dropping their mounts. Things do not improve until eventually we reboot it. The telnet interface is fine and responsive all the way through.

Netapp's support has asked for crash dumps, etc., but nothing's helped, and we're heading into a weekend. They also recommended *not* downgrading back to 5.0.1d4. Apparently 5.1.2 has bug fixes that we require(news to me).

Has *anyone* seen this? Suggestions? Thoughts?

Hitz voodoo solutions welcome. :)