id summary reporter owner description type status component version resolution keywords cc guest host 6023 VHD Delete Snapshot results in corrupt virtual hard disk or double snapshot revert Mark Cranness "1) VHD double snapshot - Restore: Restore Snapshot (snap2) immediately followed by Delete Snapshot (snap2) has the same effect as Delete Snapshot (snap2) followed by Restore Snapshot to the parent Snapshot (snap1). Any changes made between snap1 and snap2 are lost. Repro steps: * Start with a VM having a VHD file attached that has no snapshots. (I used the Windows XP Mode VHD extracted from the 32-bit Windows XP Mode download: MD5sum= 5189623a8e5c6ff518cdd4759037f109, newly attached to a new VM and not yet booted.) * Take a snapshot 'Snapshot 1' * Boot the VM and make a change (perhaps create a file). * Shutdown VM * Take a snapshot 'Snapshot 2' * Select 'Snapshot 2' and 'Restore Snapshot' immediately followed by 'Delete Snapshot' * Boot VM and note that your change has gone: The VM has been restored back to 'Snapshot 1' 2) Virtual hard disk corruption causes BSOD and/or registry repair messages at boot. Repro steps: * Start with a VM having a VHD file attached that has no snapshots. (I used the Windows XP Mode VHD extracted from the 32-bit Windows XP Mode download: MD5sum= 5189623a8e5c6ff518cdd4759037f109, newly attached to a new VM and not yet booted.) * Take a snapshot 'Snapshot 1' * Boot the VM and make a change (perhaps create a file). * Shutdown VM * Take a snapshot 'Snapshot 2' * Boot the VM then shutdown. * Select 'Snapshot 2' and 'Delete Snapshot' * Boot VM and note that it BSOD's or has other corruption problems." defect reopened virtual disk VirtualBox 3.1.2 Restore Delete Snapshot other other