Hi, I tested read only disks feature [1] and it worked fine. I used this configuration: 1) RHEL 6 VM rhel1 with shared disk mounted as RW, 2) RHEL 6 VM rhel2 with shared disk mounted as RO 3) Windows 7 VM win71 with shared disk mounted as RO rhel2 and win71 VMs sees all files on shared disk, but the disk was read only for them. Martin [1] http://www.ovirt.org/Features/Read_Only_Disk