Yes it works! Azure disk is directly attached to Azure VM as a local drive. But for the GlusterFS case, it is just a mount like NFS share for the Azure VM.

If you are going to use GlusterFS for prod system, please check https://portworx.com/debugging-kubernetes-common-errors-using-glusterfs-persistent-volumes/

Please keep in mind that GlusterFS is commonly used for file sharing like NFS and not suitable for Database Pods.

GlusterFS is based on Fuse and you might experience slow directory listing.