BIG-IP Systems: Getting Started Guide
Important: Beginning with version 10.1.0, you must reformat the systems hard drive partitions even if you plan to maintain 9.x alongside 10.x. Partitions created using version 9.x or 10.0.x software do not accommodate the 10.1.x software. To maintain both versions, you use the image2disk utility to reformat the drive and install the 10.1.x software, and then complete a separate operation using a version 9.x installation method described in the version 9.x release notes. For more information, see To format the drive for volumes and install the software.
この文言忘れてたなあ。
これを出されると負けっぽいけど、違う方向でまだ攻められそうだから頑張ろう。