ZFS on Linux: How to find the arc stats (was arcstat.py)

This has now changed; run the following to find the adaptive read cache stats (ARC):  
cat /proc/spl/kstat/zfs/arcstats
  You can gleam some really useful information out of how your RAM is being utilised and what your required ARC size might be from the results – this may be a topic for a future post, however!

Error Code 60 on an Asus Z9PE-D16

  Today a customer’s Asus Z9PE-D16 wouldn’t boot and displayed the debug code 60 – in this case the problem was that the RAM sticks (8 total, 4 for each CPU) were in the black slots rather than the blue slots. Swapping them across resulted in a boot straight away.   Hope that helps someone!