hw.mca.enabled=0?

If I am not wrong the command sysctl hw.mca.enabled=0 should do that. But I am not sure how to do this in /boot/loader.conf nor what the setting is good for.
 
Problem is:
Code: 
# sysctl hw.mca.enabled=0
sysctl: oid 'hw.mca.enabled' is a read only tunable
sysctl: Tunable values are set in /boot/loader.conf
 
Ahh... this is one of those /boot/loader.conf things that needs quotes around the value:
Code: 
hw.mca.enabled="0"
.
 
Something wrong, same string hw.mca.enabled=0 in the /boot/loader.conf file is working on my system (8.4 and 10.0).

Try to set it from boot loader prompt set hw.mca.enabled=0. If it is okay, then re-check your string in loader.conf file (each symbol!) and file "read" attribute.

However it is bad practice to ignore MCA errors.
 
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