When you have just Harmattan (like original, freshly flahed system), your partition layout is like this: mmcblk0p1 - MyDocs (fat) mmcblk0p2 - root (ext4) mmcblk0p3 - home (ext4) When you install Sailfish, you need to have partition layout like this: mmcblk0p1 - MyDocs (fat) mmcblk0p4 - ALT_OS (ext4) mmcblk0p2 - root (ext4) mmcblk0p3 - home (ext4) (note that physically your mmcblk0p4 is "in the wrong place" as it is carved out from your mmcblk0p1 but logically it does not matter...) Now, the whole business in the guide about the MOSLO boot and partitioning is to create the ALT_OS partition, mmcblk0p4. If you do not have that, you have not followed through the guide correctly, and most possibly have now messed up your device completely. Yes, then you need to start fresh, first by flashing your device to clean Harmattan. So what exactly happened, do you get any partitions to show on your linux computer? What exactly does the green text say? One very common cause of MOSLO partitioning failure is that you do not have enough free space on your mmcblk0p1. For best results, backup all your data you have on MyDocs, and then empty it before partitioning. I don't know about that, I think video guides are not good way to do things. The correct guide should be this: http://wiki.maemo.org/Ubiboot