Hi.
 
I have a problem with importing some VMs after importing storage domain in new datacenter.
 
I have 5 servers with oVirt version 4.1.7, hosted-engine setup and datacenter with iscsi, fc and nfs storages. Also i have 3 servers with oVirt 4.3.4, hosted-engine and nfs storage.
 
I've set iscsi and fc storages to maintenance and detached them successfully on 4.1.7 datacenter.
Then i've imported these storage domains via Import Domain in 4.3.4 datacenter successfully.
 
After storage domains were imported to new 4.3.4 datacenter i've tried to import VMs from VM Import tab on storages.
 
On the FC storage it was good, all VMs imported and started, all VMs in place.
 
And with iSCSI storage i've got problems:
On the iSCSI storage some VMs imported and started, but some of them missing, some of missing VMs disks are showing at Disk Import, i've tried to import disks from Disk Import tab and got error - 'Failed to register disk'.
Tried to scan disks with 'Scan Disks' in storage domain, also tried 'Update OVF' - no result.
 
What caused this? What can i do to recover missing VMs? What logs to examine?
Can it be storage domain disk corruption?
 
Please, help.
 
Thank you.