What is the fine-grained topic of the following text: While OLTP and other performance-intensive applications will continue to use higher-performing Fibre Channel drives, CLARiiON with ATA blends the economic advantages of ATA disk drives with CLARiiON's unique availability and functionality, while also inheriting all the functionality of EMC's automated storage software. Only return the topic.
Use of ATA disk drives in CLARiiON for OLTP and performance-intensive applications