Hi Sandro, I finally mounted the GPFS Filesystem as a Data Domain using this parameters on the form for New Domain : Domain Function: Data Name: name_of_the_domain Storage Type: Posix Compliant FS Path: gpfs_kvm (the name of the "device"/"filesystem" created, not an absoluthe path) VFS Type: gpfs Mount Options: rw,relatime,dev=gpfs_kvm (the dev parameter is the key to mount the filesystem). Due to a changes implemented on the Spectrum Scale / GPFS last versions, removing the block device on /dev, you must to specify this last parameter to mount correctly the filesystem. Another point is to check the correct privileges and ownership of the directory, to allow Ovirt to mount it correctly, is recommended to mount firts manually the filesystem with mmmount, and change the owner and privileges over the mountpoint. Thanks for your help. I consider that this thread is closed.