Ultra 4 Plus spin down question

Thank you for the replies, I understand the concept of leaving a device (hard drive) on all the time rather than putting it through the shock of a full shut down/turn on sequence as this same sort of logic exists in my world of consumer electronics integration - leaving amplifiers fully on or at least in standby mode rather than powered fully off, TiVo drives never sleep and last years so what you are saying makes sense and I stand corrected in my previous comment about shutting down the NAS daily. The other thing I thought about with regards to a full shut down is that I'm shutting down four drives that are running around 95 degrees and I'm also shutting down the cooling fan leaving the drives to cool passively. Probably not a good thing, correct?

So for further clarification relating to disc longevity, is putting a drive to "sleep" and waking it back up daily any different than performing a full shut down/turn on.

Finally, does anyone know why there is an issue with the sleep function of the Ultra 4 Plus? Just curious.

Thanks again,