SunSolve Infodoc 13382 tells you how to configure a simple slice to act as the required device in rootdg.
There have been numerous buggies in the SSA firmware over the years, and quite recently a MAJOR one in regard to possible data corruption. To the best of the storage business unit's knowledge, they're all fixed now, and they HIGHLY recommend all customers run with current SSA firmware.
Download the SSA configuration matrix to see what patches you need. (Postscript) (Text)
The patches are available in the public area of the SunSolve Web page, you do NOT need a support contract to download these patches. They can be accessed from:
http://sunsolve.sun.com/