I'm using Volume Snapshot Services (VSS) to backup a drive. By default all files listed under HKLM\SYSTEM\CurrentControlSet\Control\BackupRestore\FilesNotToSnapshot are deleted from the snapshot by VSS.
How can I make VSS to keep those files? There is some software (for ex. Macrium Reflect) that is able to do that. Thank you.
On systems that have it (XP doesn't), the "Shadow copy optimization writer" is the one in charge of deleting unwanted files from the shadow copy after the snapshot is taken.
I would either try to explicitely disable this writer, or call SetContext() with the VSS_VOLSNAP_ATTR_NO_AUTORECOVERY flag (it should prevent any post-snapshot write operation). However MSDN says that this flag has drawbacks.