適当にroot化情報

Lenovo Idea Tab A2107A Root化
http://alphia246.blogspot.jp/2013/02/lenovo-idea-tab-a2107a-root.html

A2107A Root + CWM + Custom Rom
http://www.android-hilfe.de/lenovo-ideapad-a2107a-forum/341347-a2107a-root-cwm-custom-rom.html

Root MANY ANDROID! [Upd: 18.12.2012]
http://forum.xda-developers.com/showthread.php?t=1886460