according to the release notes:
2) RIVERBED PRODUCT COMPATIBILITY
SCC 9.0 is fully compatible with SteelHead 8.0.x, 8.5.x, 8.6.x and SteelHead 9.0.x appliances, and SteelHead EX versions 2.0.x, 2.1.x, 3.0.x, 3.1.x, 3.5.x, and 3.6.x.
SCC 9.0.0 is compatible with the following Riverbed products and versions: Interceptor 3.0.x, 4.0.x, 4.5.x, SteelCentral Controller for SteelHead Mobile 3.1.x, 4.0.x, 4.5x, Whitewater 3.0, 3.1 andGranite 2.5,3.0and3.6.
SCC 9.0 continues to allow upgrades, monitoring, and troubleshooting SteelHead versions 6.5 and 7.0.
SCC 9.0.0 running on the CMC 8150 hardware platform can manage RSP on supported SteelHead appliances. RSP management is not available when using the SCC 1000 hardware platform.