They should work. Works for all cores of your host system. Also you can download ESXi from here.
This process requires that you are able to ssh OR log in locally using the root user account and that no services be running as users out of /home on the target machine.
The examples are from a default installation with no customization-you NEED to know what you're working with for volumes/partitions to not horribly break things.
By default, CentOS 7 uses XFS for the file system and Logical Volume Manager (LVM), creating 3 partitions: /
,/home
and swap.
NOTE: If you want to be sure that nothing is writing to /home
you can either modify the host to boot into single-user mode OR try to use the
systemctl isolate runlevel1.target
command to switch (not tested! should work).