During my testing, before Fusion-IO ironed out all of the configuration issues, I kept having drives drop offline. Normally I’d blame my own stupidity, but my tests were run in FusionIO’s datacenter, on their servers, configured by their staff. I connected via remote desktop, set up SQLIO per my SQLIO tutorial at SQLServerPedia, and ran the tests. During my tests, ioDrives appeared to have failed and FusionIO staff had to replace them. It took several weeks for us to narrow down several unfortunate problems.
If you truly try to push your IO subsystems to the limit, a Fusion-IO subsystem will expose more weaknesses than other storage subsystems because it has so much more throughput. Some of the problems included motherboard issues, driver problems, OS configuration errors, and even insufficient power supplies that couldn’t handle the load of multiple drives.
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