@31896 From a customer standpoint, you're really interested in the I/O rate, data rate and consistency of performance....
It may be a unified storage system that has enough performance for your application and that's great. If not, maybe a block-based system alone might be the best answer. Don't worry so much about the design details. Look at the system overall and determine if it will meet the needs of your applications. Performance variability often trips up customers, so be sure that the unified storage platform will provide adequate performance across a range of variability, and see if it is possible to dedicate resources to handle critical jobs. If you can manage that, a unified storage system may be a fitting solution.
Listen to the unified storage FAQ audiocast.
Go to the beginning of the Unified Storage FAQ Guide.