[ovirt-users] VM Snapshots not erasable and not bootable

Hello, I make automatically backups of my VMs and last night there was making some new one. But somehow ovirt could not delete the snapshots anymore, in the log it show that it tried the hole day to delete them but they had to wait until the merge command was done. In the evening the host was totally crashed and started again. Now I can not delete the snapshots manually and I can also not start the VMs anymore. In the web interface I get the message: VM timetrack is down with error. Exit message: Bad volume specification {'address': {'bus': '0', 'controller': '0', 'type': 'drive', 'target': '0', 'unit': '0'}, 'serial': 'fd3b80fd-49ad-44ac-9efd-1328300582cd', 'index': 0, 'iface': 'scsi', 'apparentsize': '1572864', 'specParams': {}, 'cache': 'none', 'imageID': 'fd3b80fd-49ad-44ac-9efd-1328300582cd', 'truesize': '229888', 'type': 'disk', 'domainID': '9c3f06cf-7475-448e-819b-f4f52fa7d782', 'reqsize': '0', 'format': 'cow', 'poolID': '59ef3a18-002f-02d1-0220-000000000124', 'device': 'disk', 'path': '/rhev/data-center/59ef3a18-002f-02d1-0220-000000000124/9c3f06cf-7475-448e-819b-f4f52fa7d782/images/fd3b80fd-49ad-44ac-9efd-1328300582cd/47c0f42e-8bda-4e3f-8337-870899238788', 'propagateErrors': 'off', 'name': 'sda', 'bootOrder': '1', 'volumeID': '47c0f42e-8bda-4e3f-8337-870899238788', 'diskType': 'file', 'alias': 'ua-fd3b80fd-49ad-44ac-9efd-1328300582cd', 'discard': False}. When I check the path permission is correct and there are also files in it. Is there any ways to fix that? Or to prevent this issue in the future? In the attachment I send also the engine.log Regards Jonathan