I have a sles12sp3 (physical) in production running off dell emc unity.
Recently, i upgraded unity software which took around 1 hour.
Once the upgrade was completed, i found the suse machine in hung condition.

I am using Linux multipath and think it was unable to failback. or both paths were disconnected while the upgrade happened.(EMC RESTARTS SP ONE BY ONE)

Although I am booting from unity, i don't find any multipath.conf file
I am new to Linux. And want to fix this issue. Can anyone help?