I was kind of hoping for a guideline like each spinup is equavalent to X hour of idle spinning. You can do the math for power consuption, but I guess that wear and tear is a bit more difficult.
I was looking at the specs for one of my drives and couldn't find a lifetime in hours or mtbf, but it did say "Contact Start/Stop Cycles 50,000 minimum". If by that they mean spinup cycles, then if I wanted it to last 10 years, I should limit spinups to less than 87600hr/50000 or every 1.7hr minimum, or, say, less than 10-15 per day. Probably way too simplistic analysis, but hey. Brady <[EMAIL PROTECTED]> writes: > I am not so sure about modern drives. They changed the way that they > handle spindle connections after I stopped killing drives for a > living. However I can tell you this: it is very common for a drive > that has been spinning for long periods to simply not spin back up. > The motor can continue spinning the drive but doesn't have enough > power to start it spinning again. This is why a reboot of an entire > cluster often means four or five systems keeling over due to bad > fans/hard drives. > > Most drives will last a long time if left on. However, this is a bad > things to rely on as the dive may just up and barf one reboot. > > Usually I find that spun down drives die far less often when paired > with a cheap power supply. If your power supply isn't top notch then > spin down your drive and reduce the risk of power problems. If you > have top notch drives then keep them spinning so you can reduce the > wear during start/stop. By high quality I am not just talking about > "$100 or more" I am talking about a nice regulated supply that has > tight tolerances. > > Mostly I go by a simple rule: A drive should only spin up/down about > once per day.
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