No, I've seen this happen on larger arrays. The restart with a degraded array risks another drive not coming up and then you are on very thin ice. Powercycles are usually benign but they don't have to be and on an array there is a fair chance that all of the drives are equally old and if one dies there may be another that is marginal but still working. Statistically unlikely but I have actually seen this in practice so I'm a bit wary of it. The larger the array the bigger the chance. This + the risk of controller failure is why my backup box is using software RAID 6. It definitely isn't the fastest but it has the lowest chance of ever losing the whole thing. I've seen a hardware raid controller fail as well and that was a real problem. For one it was next to impossible to find a replacement and for another when the replacement finally arrived it would not recognize the drives.