makk Posted May 5, 2021 Share Posted May 5, 2021 Greetings, Before all updates in System Preferences Energy tab used to have Put Hard drive to sleep. It has disappeared after a powernap. So I changed the mac model to about 5 different ones to see if this option shows and then switched back to the mac model I had. Then the option showed up until the first powenap then disappeared. In pmset it does show up as disksleep, just not in System Preferences any longer. What would cause this to happen? I looked at kexts, SSDT's config.plist and it is possible that some SSDT conflicts. Anyone else experience this? Can you share what you did to make it not disappear? Thanks Link to comment Share on other sites More sharing options...
2886zhu Posted May 5, 2021 Share Posted May 5, 2021 on Big Sur it's not a issue,you plugin any usb drive it will show up "Put Hard drive to sleep" on energy saver if you only get SSD drive on your pc. Link to comment Share on other sites More sharing options...
makk Posted May 5, 2021 Author Share Posted May 5, 2021 1 hour ago, 2886zhu said: on Big Sur it's not a issue,you plugin any usb drive it will show up "Put Hard drive to sleep" on energy saver if you only get SSD drive on your pc. ah, I see strange thing. Yes I have SSD drive. Thanks good answer. But we want his on all the time so as to not be confused. Link to comment Share on other sites More sharing options...
Henties Posted May 5, 2021 Share Posted May 5, 2021 @makk Nothing to worry about, the missing "Put hard disks to sleep when possible" in "Energy Saver" has become a "cool" feature as it is superfluous in a build without spinning disks - which "hard disks" indeed are. NVMe's and SSD's have no mechanical wear and thus do not require this feature in order to extend their longevity. Why that missing option suddenly shows up when a memory stick is inserted into a USB port is beyond my comprehension, because it is also a non spinning data carrier -medium -, same as SSD's and NVMe's Greetings Henties Link to comment Share on other sites More sharing options...
makk Posted May 5, 2021 Author Share Posted May 5, 2021 Interesting. Thank you! It is funny to even think to have it. But it would require it due to power going to the SSD drive. should be similar to USB ports. idle mode drop in voltage amps. Sleep mode is funny word. Should be reduced power. Makes more sense. sleep confuses issues in the brain. I want to sleep now do I sleep with lower voltage to my body? lol.... for another Sunday... USB I would imagine because it requires port voltage. Funny thing about this USB, when in powernap the port gets disconnected. have to pull it out. Same with USB mouse not always but at times. Intermittent. Probably too many UIAC and USBX ec things? Confusing at times which one is working and isn't. Consistency is what I'm looking for. In Catalina the Disksleep checkbox remains regardless of plugged in or not. So in Big Sur they must have changed to detect USB ports and HDD's. Which then causes a problem with powernapping for USB ports. Thank you ! Good to know so I won't freak out Link to comment Share on other sites More sharing options...
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