单项选择题 How many expansion frames can be attached to an IBM TS3500 model L23 or L53 base frame? （）

单项选择题 A customer has an existing high availability SAN environment with CLARiiON, which has been stable for 16 months. They have recently experienced several outages with their current storage systems. They need to purchase additional storage and have asked about tier 1 storage. They are concerned with connecting their existing storage and servers without trouble. Which resource should be consulted while developing the solution options?（）

单项选择题 What is required for the minimum configuration of the TS7650 ProtecTIER Appliance console? （）