[ovirt-users] After attaching the Storage domain, the VMs are disappeared from the VM import

Hi, We're noticing some weird issue while re-attaching the storage domain. After re-attach the storage domain, some VMs are completely missing from the VM Import. Before detaching the storage domain, all the VMs were shutdown gracefully. I also noticed some disks are exists with no Alias under the disk import on the storage domain and I can't import those disks. Its failed to register the disk with <UNKONOWN> error. We're using Ovirt 4.2 with multiple Dell hosts in the cluster and Compellent SAN with iSCSI volumes. Please kindly advise if I am missing anything before detach the storage domain. Thanks