I have a problem with an old FAS270 DOT126.96.36.199P4, few days ago I've received 4 notifications with the subject "Reboot (panic) warning". Watching the syslog, I see:
Panic String: Page fault accessing addr 0x0000000000000028 from pc 0xffffffff80a384e0 in process wafl_lopri on release NetApp Release 188.8.131.52P4
The filer has 2 disk shelves installed connected in cascade through the modules ESH B (modules ESH A are missing)
Do you know why It happens?