Last night I took a snapshot of a VM before adding a new disk and running an offline defrag of Exchange (using the newly added disk as the temporary path).
When I woke up today the server was offline, and when I opened vSphere I saw the message "Configuration Issues - Virtual machine disks consolidation is needed". I answered the question and chose Abort/Cancel. The VM then booted. The Exchange database is now ~160GB (down from about 240GB), which is about the size I expected it to be after the defrag. That made me suspect the defrag may have completed, but alas it wouldn't mount.
At this stage my preference would be to revert to the snapshot. Has anyone been in this situation before? I've done lots of reading but have only found articles explaining how to fix the "needs consolidation" error by consolidating. I can't find anything about deleting the unwanted delta disks to revert to the original.
Is there a supported way to delete these unwanted delta disks without consolidating them?
Could I simply move the diskname-000001.vmdk files elsewhere then boot the VM? (I also have some files with the .REDO_nSGail extension that I assume I would need to move too). The original .vmdk files will be in read-only mode though - is there a way I can set them back to read-write?
Thanks to anyone that can offer some advice.
Other info: - ESXi 6.0 - VM is a Windows SBS box (which has both Exchange and AD). It also has about 1TB of data and not enough free space on the data store to restore it all. I'd have to move off all the VM files first, then restore a backup which would take many hours so I'd rather avoid that if possible.