solid hard disk on 12.1 RU1 MP1 - smc stop fixes, also so does removing network cable
After upgrading over 1600 machines to SEP 12.1 RU1 MP 1 we are now getting reports from users saying their machines are unresponsive to anything. This is since upgrading SEP to SEP 12.1.
This happens to a lot of machines directly after upgrading but is also happening to machines that have been rebuilt with a fresh install of SEP.
One thing to note - running SMC -stop instantly fixes the issue - the hard disk stops been solid and machne becomes responsive. Also I've since noticed that if we remove the network cable from the machine the machine instantly becomes responsive and the hard disk light settles down.
It's clear that this is a result of upgrading to SEP 12.1 RU1 MP1 - but why?
If I completely remove SEP and reinstall problem still exists. I've checked scan logs and no scans have run since upgrade on most machines so that's not the cause either
downgrading to SEP 11 fixes the problem