[ovirt-users] OS moves after reboot to different device

Hi All, I just built a 3 node cluster (4.5.2) with 3 Virtual Disks on identical Dell Servers. First Virtual Disk /dev/sda - BOSS Card - 450GB Second Virtual Disk /dev/sdb - SSD 14TB Third Virtual Disk /dev/sdc - HDD 72TB All OS disks were /dev/sda before reboot Following reboot only first Node is still /dev/sda - other 2 nodes are now /dev/sdc This obviously makes it impossible to create VG groups and create Gluster storage volumes. Can anyone shed any light on why this is happening and how to prevent it. Kind regards Simon