Description of problem: When converting a disk of block type (resides on Netapp) - ISCSI/FCP, sometime we might see this issue: "2022-04-17 12:23:01,219+03 INFO [org.ovirt.engine.core.vdsbroker.vdsbroker.GetHostJobsVDSCommand] (EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-22) [18e96916-3ccc-4ff0-b398-c4538a29803b] FINISH, GetHostJobsVDSCommand, return: {0f0857d6-e75e-4656-8fd0-9186f7d7dd09=HostJobInfo:{id='0f0857d6-e75e-4656-8fd0-9186f7d7dd09', type='storage', description='copy_data', status='failed', progress='100', error='VDSError:{code='GeneralException', message='General Exception: ("Command ['/usr/bin/qemu-img', 'convert', '-p', '-t', 'none', '-T', 'none', '-f', 'raw', '-O', 'qcow2', '-n', '/rhev/data-center/mnt/blockSD/5736683f-4004-4404-9b60-6d684cda4296/images/9723180f-8b06-4d7a-8761-8874c8c3ee74/b04804f8-38da-4d19-b939-ddfdc8ea5f7d', '/rhev/data-center/mnt/blockSD/5736683f-4004-4404-9b60-6d684cda4296/images/9723180f-8b06-4d7a-8761-8874c8c3ee74/6234d93b-99bf-4239-9b0a-828eba599cd2'] failed with rc=1 out=b'' err=bytearray(b'qemu-img: error while writing at byte 1071644672: No space left on device\\n')",)'}'}}, log id: 99f78ab" Version-Release number of selected component (if applicable): engine-4.5.0.2-0.7.el8ev vdsm-4.50.0.12-1.el8ev.x86_64 How reproducible: It might happen continuously and suddenly start working again (not sure how consistent this theory is, just from what I could see) Steps to Reproduce: 1. Create disk ISCSI/FCP POST engine/ovirt-engine/api/disks <disk> <storage_domains> <storage_domain id="{{ISCSI_SD}}"/> </storage_domains> <name>ISCSI_Raw-Preallocated-Disabled</name> <provisioned_size>1073741824</provisioned_size> <format>raw</format> <sparse>false</sparse> <backup>None</backup> </disk> 2. Convert the disk to POST engine/ovirt-engine/api/disks/{{ISCSI_Raw-Preallocated-Disabled}}/convert <action> <disk> <format>cow</format> <backup>incremental</backup> </disk> </action> Actual results: The disk fails to convert its format type from raw to cow with the error "No space left on device" Expected results: The disk should be converted successfully from raw/Preallocated/Disabled to Cow/Preallocated/Enabled
Verified. Problem does not appear during flow reproduction. Disk was successfully converted from Raw/Preallocated/Disabled to Cow/Preallocated/Enabled. Versions: engine-4.5.1-635.bba3bb6ad58e.55.el8ev vdsm-4.50.0.13-1.el8ev.x86_64
This bugzilla is included in oVirt 4.5.1 release, published on June 22nd 2022. Since the problem described in this bug report should be resolved in oVirt 4.5.1 release, it has been closed with a resolution of CURRENT RELEASE. If the solution does not work for you, please open a new bug report.