Given the lack of support for my RAID drives on v11 boot CD, I had to resign to move back to v10. I uninstalled v11. Then reinstalled v10. ...but this became quite stressing as when reinstalling v10 the setup asked me to confirm whether I really wanted to overwrite "more recent" version of system files timntr.sys and tifsfilt.sys that were in C:\WINDOWS\System32\DRIVERS. I sweat a lot as some posts of the net telling that those files used to cause GPF blue screens in the past ( version 8 ). So I started looking carefuly for the best option and observed: - the files seems to be associated strictly to Acronis (or its embedded BootPE technology) - ...that although the message was speaking of newer file I could actually not find them anymore in the target drive (some leftover of their signature in the registry?), so I believe that I was at risk of not having them at all if not 'replacing' them So I though that the best option was to do "yes, replace more recent files". Apparentely a good choice: reboot went OK and I am now doing back a backup with v10 'as usual'.