We have an oVirt 4.5.6 cluster with a self-hosted engine with an iSCSI Data (Master) domain. The oVirt UI shows that it has plenty of space:
Size: 66559 GiB
Available: 46359 GiB
Used: 20200 GiB
Allocated: 22589 GiB
When trying to create a new disk, however, we receive the errors below complaining that the Volume Group has insufficient free space.
How can we safely reclaim this space, ideally without shutting down ever VM that’s using this storage domain? Although “multipath -ll” shows the underlying devices on the host machines, the normal “pvs / vgs / lvs” commands don’t see them.
Many thanks,
Devin
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2026-03-20 14:39:13,038-04 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker.HSMGetAllTasksStatusesVDSCommand] (EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-31) [] Failed in 'HSMGetAllTasksStatusesVDS' method
2026-03-20 14:39:13,080-04 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-31) [] EVENT_ID: VDS_BROKER_COMMAND_FAILURE(10,802), VDSM lnxvirt06 command HSMGetAllTasksStatusesVDS failed: value=Cannot create Logical Volume: 'cmd=[\'/sbin/lvm\', \'lvcreate\', \'--devices\', \'/dev/mapper/mpathd,/dev/mapper/mpathj,/dev/mapper/mpathm\', \'--config\', \'devices { preferred_names=["^/dev/mapper/"] ignore_suspended_devices=1 write_cache_state=0 disable_after_error_count=3 hints="none" obtain_device_list_from_udev=0 } global { prioritise_write_locks=1 wait_for_locks=1 use_lvmpolld=1 } backup { retain_min=50 retain_days=0 }\', \'--autobackup\', \'n\', \'--contiguous\', \'n\', \'--size\', \'3072000m\', \'--wipesignatures\', \'n\', \'--addtag\', \'OVIRT_VOL_INITIALIZING\', \'--name\', \'3b8c4d37-0807-4a16-8dcf-f6aee207b4e6\', \'4f1e2b92-fe8d-47ef-b0ba-a9c7501bf254\'] rc=5 out=[] err=[\' Volume group "4f1e2b92-fe8d-47ef-b0ba-a9c7501bf254" has insufficient free space (7726 extents): 24000 required.\']' abortedcode=550
2026-03-20 14:39:13,080-04 INFO [org.ovirt.engine.core.bll.tasks.SPMAsyncTask] (EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-31) [] SPMAsyncTask::PollTask: Polling task '4f9a9858-290b-4ed8-9a42-0bc8d4d7aca6' (Parent Command 'AddImageFromScratch', Parameters Type 'org.ovirt.engine.core.common.asynctasks.AsyncTaskParameters') returned status 'finished', result 'cleanSuccess'.
2026-03-20 14:39:13,083-04 ERROR [org.ovirt.engine.core.bll.tasks.SPMAsyncTask] (EE-ManagedScheduledExecutorService-engineScheduledThreadPool-Thread-31) [] BaseAsyncTask::logEndTaskFailure: Task '4f9a9858-290b-4ed8-9a42-0bc8d4d7aca6' (Parent Command 'AddImageFromScratch', Parameters Type 'org.ovirt.engine.core.common.asynctasks.AsyncTaskParameters') ended with failure:
-- Result: 'cleanSuccess'
-- Message: 'VDSGenericException: VDSErrorException: Failed to HSMGetAllTasksStatusesVDS, error = value=Cannot create Logical Volume: 'cmd=[\'/sbin/lvm\', \'lvcreate\', \'--devices\', \'/dev/mapper/mpathd,/dev/mapper/mpathj,/dev/mapper/mpathm\', \'--config\', \'devices { preferred_names=["^/dev/mapper/"] ignore_suspended_devices=1 write_cache_state=0 disable_after_error_count=3 hints="none" obtain_device_list_from_udev=0 } global { prioritise_write_locks=1 wait_for_locks=1 use_lvmpolld=1 } backup { retain_min=50 retain_days=0 }\', \'--autobackup\', \'n\', \'--contiguous\', \'n\', \'--size\', \'3072000m\', \'--wipesignatures\', \'n\', \'--addtag\', \'OVIRT_VOL_INITIALIZING\', \'--name\', \'3b8c4d37-0807-4a16-8dcf-f6aee207b4e6\', \'4f1e2b92-fe8d-47ef-b0ba-a9c7501bf254\'] rc=5 out=[] err=[\' Volume group "4f1e2b92-fe8d-47ef-b0ba-a9c7501bf254" has insufficient free space (7726 extents): 24000 required.\']' abortedcode=550, code = 550',
-- Exception: 'VDSGenericException: VDSErrorException: Failed to HSMGetAllTasksStatusesVDS, error = value=Cannot create Logical Volume: 'cmd=[\'/sbin/lvm\', \'lvcreate\', \'--devices\', \'/dev/mapper/mpathd,/dev/mapper/mpathj,/dev/mapper/mpathm\', \'--config\', \'devices { preferred_names=["^/dev/mapper/"] ignore_suspended_devices=1 write_cache_state=0 disable_after_error_count=3 hints="none" obtain_device_list_from_udev=0 } global { prioritise_write_locks=1 wait_for_locks=1 use_lvmpolld=1 } backup { retain_min=50 retain_days=0 }\', \'--autobackup\', \'n\', \'--contiguous\', \'n\', \'--size\', \'3072000m\', \'--wipesignatures\', \'n\', \'--addtag\', \'OVIRT_VOL_INITIALIZING\', \'--name\', \'3b8c4d37-0807-4a16-8dcf-f6aee207b4e6\', \'4f1e2b92-fe8d-47ef-b0ba-a9c7501bf254\'] rc=5 out=[] err=[\' Volume group "4f1e2b92-fe8d-47ef-b0ba-a9c7501bf254" has insufficient free space (7726 extents): 24000 required.\']' abortedcode=550, code = 550’
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