I'm looking into convert a single server/comp into the start of a glusterfs distributed system. I already have a directory mounted on this server of 24TB RAID. I want to use this initial computer to setup glusterfs with this volume/directory and then add additional bricks/computers soon after. I am unsure if I can use a volume/directory with files in it already.
Yes you could. I just tested with couple of test bricks with data already in it and it worked for me. I am using gluster 3.3 on Centos 6.3