Description of problem: when moving a block-based preallocated disk with incremental backup enabled (format: COW, type: PREALLOCATED) to another block-based SD it is moved as (format: COW, type: SPARSE) Version-Release number of selected component (if applicable): vdsm-4.50.3.7-1.el8ev.x86_64 How reproducible: every time Steps to Reproduce: 1. move block-based preallocated disk with incremental backup enabled (format: COW, type: PREALLOCATED) to another block-based SD Actual results: image is - format: COW, type: SPARSE Expected results: the image will be - format: COW, type: PREALLOCATED Additional info:
Benny, you said it sounds familiar, can you please take a quick look?
This bug has low overall severity and is not going to be further verified by QE.
verification steps: 1. create a VM with a disk that is set with incremental-backup enabled a on storage domain 2. start the VM (not mandatory I think but that's part of the reported issue) 3. verify the disk configuration is qcow+preallocated with (on the host that the VM runs on): vdsm-tool dump-volume-chains <storage domain id> | grep -A3 <image id> 4. move the disk to another block storage domain 5. when the disk movement completes, verify the disk configuration remains qcow+preallocated with the aforementioned command in step 3 (that points to the new storage domain)
This bug has low overall severity and passed an automated regression suite, and is not going to be further verified by QE.