Ticket #5981 (closed defect: duplicate)
VHD corrupted after Delete Snapshot
|Reported by:||atpetro||Owned by:|
Delete Snapshot causes the resulting VHD to become corrupt, unrepairable and unbootable. I’ve tested creating multiple snapshots (2-3 levels deep) by adding files to the desktop. I can then delete all those snapshots and end up with a single VHD that contains all the changes of the now merged snapshots (all the files on the desktop). This works great for small snapshot diff drives (< 1GB). However, once I start doing any significant work in the snapshots causing the diff drive to be > 1GB (sometimes as big as 10GB), the merge process ends up corrupting the resulting VHD. One time I had CHKDSK run on the resulting VHD – it found lots of corrupt files but couldn’t restore them – this broke IIS, SharePoint, Office, etc when Windows finally booted. I deleted that VHD and started over - creating snapshots again, and then deleting/merging them down to a single VHD. Now windows won’t even boot – it just hangs on crcdisk.sys – safe mode won't boot and repair can't find anything to fix. The VHD is Windows 2008 32-bit. I’ve also experienced the same corruption with snapshots using Windows 2008 R2 64-bit VHD. Snapshots are unsuable if they corrupt the root VHD. I’ve attached the log.