title: Is it possible to recover certain SVN revision by reverse merge?
body: <p>I have TortoiseSVN 1.8.7 + VisualSVN Server 2.7.7 installed on my PC (Windows Server 2012). Recently my colleague told me when he try to update, "The XML response contains invalid XML" error appeared after the dialog listed several updated files. When he update again, the working copy is locked and need cleanup.</p>
  
  <p>I'm using the same repository as my colleague, but I can update and commit without problem.</p>
  
  <p>After investigation, I found disk error in Event Viewer, and when I opened the log, I can not see log earlier than 6291. I tried to open the file "project\db\rev\6290", and after 10~15 sec., the content is empty, and more disk error is appeared in Event Viewer. I copied all files with robocopy to another disk, only the file above is failed.</p>
  
  <p>I thought these revision files are like diff files, so maybe I can use working copy(currently r6295) and project\db\6291~6295 to "reverse merge" to 6290? Is it possible?</p>