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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 16:52:07 +0200 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 16:52:17 +0200 |
| commit | 9260319e7411ff8281700a532caa436f40120ec4 (patch) | |
| tree | 2f6bfe5f3458dd49d328d3a9eb508595450adec0 /gitlab/issues_text/target_missing/host_missing/accel_missing/941 | |
| parent | 225caa38269323af1bfc2daadff5ec8bd930747f (diff) | |
| download | qemu-analysis-9260319e7411ff8281700a532caa436f40120ec4.tar.gz qemu-analysis-9260319e7411ff8281700a532caa436f40120ec4.zip | |
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Diffstat (limited to 'gitlab/issues_text/target_missing/host_missing/accel_missing/941')
| -rw-r--r-- | gitlab/issues_text/target_missing/host_missing/accel_missing/941 | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/gitlab/issues_text/target_missing/host_missing/accel_missing/941 b/gitlab/issues_text/target_missing/host_missing/accel_missing/941 new file mode 100644 index 000000000..1211f9670 --- /dev/null +++ b/gitlab/issues_text/target_missing/host_missing/accel_missing/941 @@ -0,0 +1,41 @@ +qemu-img cannot repair a qcow2 in an LV because size is mis-detected when qcow2 is on an LV +Description of problem: +This is RHEV with Tb's of VMs which need to be repaired due to a datacenter-wide (the real datacenter) power outage. + +Each of these VMs are on individual LVs but qemu-img check fails to perform repairs: + + +``` +ERROR cluster 24481205 refcount=0 reference=1 +ERROR cluster 24481206 refcount=0 reference=1 +Rebuilding refcount structure +ERROR writing refblock: No space left on device <============ +qemu-img: Check failed: No space left on device +``` + +Running qemu-img check or info on the LV (/dev/dm-*) works well but repairs cannot be completed: + +``` +# qemu-img info /dev/cdd4e215-8c6b-4877-b2be-fdba383e7eb0/fb32333b-2334-4e10-8c42-02bc97e826cc +image: /dev/cdd4e215-8c6b-4877-b2be-fdba383e7eb0/fb32333b-2334-4e10-8c42-02bc97e826cc +file format: qcow2 +virtual size: 1.5 TiB (1649267441664 bytes) +disk size: 0 B <================================ +cluster_size: 65536 +Format specific information: + compat: 1.1 + compression type: zlib + lazy refcounts: true + refcount bits: 16 + corrupt: false + extended l2: false +``` +Steps to reproduce: +1. Have a damaged VM with its qcow2 in an LV +2. run 'qemu-img check <device>' verify that it properly detects the blocks which need fixing. +3. run 'qemu-img check -r all <device>', it exits with 'no space left on device´ after a few seconds. +Additional information: +https://bugzilla.redhat.com/show_bug.cgi?id=1519071 + + +Here is one example: |