Well in our case (Fortune 500) we have iSeries and pSeries systems built on different generations of Power. They just aren't consumer grade machines out there, or better put commodity priced machines.
When your are already invested it is far safer to stay with what works for you. My downtime is measured in hours per year and all of it has been scheduled across the last seven years; that was the last time we had an unscheduled outage. You can achieve this will all types of hardware; well maybe not all types; but it is easier with some than compared to others and expectations are certainly much higher.
We joke at work that we get forgotten all the time because our daily ready for business meetings; all groups reporting in; never see us mentioned except to state plans for upcoming quarterly maintenance. A pleasant state to be in
This is probably a bit picky since you don't mention what those machines do, but that's not even "four nines" in the high-availability scale. I'm not sure that's something to boast about for a Fortune 500 company or any kind of praise for the IBM series. Maybe you meant hours over the last seven years?
Not op but it sounded like it was scheduled downtime so perhaps it was meant as a per-system number and either redundancy kept the availability higher or the service wasn't needed when downtime was scheduled (overnight, weekends, etc)
When your are already invested it is far safer to stay with what works for you. My downtime is measured in hours per year and all of it has been scheduled across the last seven years; that was the last time we had an unscheduled outage. You can achieve this will all types of hardware; well maybe not all types; but it is easier with some than compared to others and expectations are certainly much higher.
We joke at work that we get forgotten all the time because our daily ready for business meetings; all groups reporting in; never see us mentioned except to state plans for upcoming quarterly maintenance. A pleasant state to be in