I was teaching the students about reliability in STAT353 Engineering Statistics. I showed them that having components in parallel made the system more reliable from the rules. I made an off the cuff remark that about RAID disks, although being redundant, were not in my experience as reliable as they claimed.
One of students asked during the lecture what level of RAID disk was used. he then told me that the reliability would depend on the RAID level. Which is true of course.
I should and plan to work this example into next year's lectures, because it is clearly something that
the students are interested in.
