When IBM first came out with the SAN Volume Controller in 2003, we were able to show that adding Intel-based SVC nodes can improve the performance and functionality of POWER-based DMX boxes from EMC. EMC salesmen often retorted with "Yes, but do you really want to risk your mission-critical data going through an Intel-based processor solution?" This FUD implied that Intel had a bad reputation for quality and reliability. The original Symmetrix were based on Motorolla 68000's but they modernized to use IBM's POWER chips in their later models. EMC's previous attempt to use Intel technology was their EMC Invista, a commercial failure. It is no surprise then that EMC DMX customers are scared to death to move their mission critical data over to Intel-based V-max.
I have found the primary reason people fear Intel-based solutions is their experience with poorly-written Windows programs. There were enough of these poorly-written Windows programs that everyone has either personal experience, or knows someone who has, and that was enough.
It reminds me of the time I was in Vac, Hungary, giving a lab tour to a set of prospective clients where we manufacture the DS8000 series and SAN Volume Controller. Rows and rows of beautiful Hungarian women sliding disk drives in place, and big hefty Hungarian beefcake moving the finished units to their appropriate places. The head of the facility explained all about the hardware technology, how we check and double check all of the equipment individually, and together as a system. One client stated "Yes, but how often are problems from the hardware? We find nearly all of our problems on disk systems from whichever storage vendor we buy from are in the microcode." It's true.
Both Intel-based processors and POWER-based processors have all the technological functions needed to run storage systems. The difference is all in the microcode. So, if you are looking for safe and stable microcode, the IBM System Storage DS8700 continues its POWER-based tradition for compatibility with previous models. For those that demand x86-based units, the IBM SAN Volume Controller has been around since 2003, the XIV Storage System has been in production since 2005, and our IBM N series are also Intel-based, running Version 7 of the ONTAP operating system.