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+id = 1179
+title = "qemu-img snapshot would break win8.1's system disk data"
+state = "closed"
+created_at = "2022-08-28T05:21:15.350Z"
+closed_at = "2022-08-29T05:42:48.641Z"
+labels = []
+url = "https://gitlab.com/qemu-project/qemu/-/issues/1179"
+host-os = "Ubuntu 22.04"
+host-arch = "x86_64"
+qemu-version = "QEMU emulator version 7.0.0 (v7.0.0-dirty)"
+guest-os = "Windows 8.1"
+guest-arch = "x86_64"
+description = """`qemu-img snapshot` will cause a damage on windows 8.1 virtual machine"""
+reproduce = """1.shutdown the virtual machine
+
+2.exec command
+```
+$ qemu-img snapshot -d standard /media/user/SSD_VM/disk/win8_1.qcow2
+...
+ERROR cluster 554329 refcount=0 reference=1
+ERROR cluster 554330 refcount=0 reference=1
+ERROR cluster 554331 refcount=0 reference=1
+ERROR cluster 554332 refcount=0 reference=1
+ERROR cluster 554333 refcount=0 reference=1
+ERROR cluster 554334 refcount=0 reference=1
+ERROR cluster 554335 refcount=0 reference=1
+Leaked cluster 557183 refcount=2 reference=1
+Leaked cluster 557472 refcount=2 reference=1
+Leaked cluster 564785 refcount=2 reference=1
+...
+Leaked cluster 580393 refcount=2 reference=1
+Leaked cluster 580434 refcount=2 reference=1
+Leaked cluster 580713 refcount=2 reference=1
+Leaked cluster 580718 refcount=2 reference=1
+Leaked cluster 580726 refcount=2 reference=1
+Leaked cluster 580965 refcount=2 reference=1
+Leaked cluster 581268 refcount=2 reference=1
+Leaked cluster 581280 refcount=2 reference=1
+Leaked cluster 581367 refcount=2 reference=1
+Leaked cluster 582743 refcount=2 reference=1
+Leaked cluster 582938 refcount=2 reference=1
+Leaked cluster 583026 refcount=2 reference=1
+Leaked cluster 583027 refcount=2 reference=1
+Leaked cluster 583028 refcount=2 reference=1
+Leaked cluster 583029 refcount=2 reference=1
+Rebuilding refcount structure
+Repairing cluster 547917 refcount=1 reference=0
+Repairing cluster 547936 refcount=1 reference=0
+Repairing cluster 547955 refcount=1 reference=0
+Repairing cluster 548069 refcount=1 reference=0
+Repairing cluster 548092 refcount=1 reference=0
+Repairing cluster 548115 refcount=1 reference=0
+Repairing cluster 548125 refcount=1 reference=0
+Repairing cluster 548128 refcount=1 reference=0
+Repairing cluster 548130 refcount=1 reference=0
+Repairing cluster 548144 refcount=1 reference=0
+Repairing cluster 548146 refcount=1 reference=0
+Repairing cluster 548150 refcount=1 reference=0
+Repairing cluster 548199 refcount=1 reference=0
+Repairing cluster 548201 refcount=1 reference=0
+Repairing cluster 548226 refcount=1 reference=0
+Repairing cluster 548234 refcount=1 reference=0
+Repairing cluster 548236 refcount=1 reference=0
+Repairing cluster 557073 refcount=1 reference=0
+Repairing cluster 557074 refcount=1 reference=0
+...
+
+```
+
+3.start the virtual machine , it shows blue screen error:
+`UNEXPECTED_STORE_EXCPETION`
+![Screenshot_20220828_131532](/uploads/d8c03c01deb9ae1183a4efd823850c7e/Screenshot_20220828_131532.png)"""
+additional = """the windows virtual machine will automatically fix the damage that qemu-img caused on next restart ."""