On Sun, Dec 16, 2018 at 01:09:48PM +0200, borissh1983@xxxxxxxxx wrote: > Hi, > > I got to a slight confusion about what is the correct way to safely disconnect > hdd sata over usb adapter with external power unit from laptop running Linux > (4.18). > > my current action list was : > > 1. unmount everything That's all you need to do. You can also issue a "power off" command to the drive now if you want to shut off the power to it (and the drive/controller actually support it). I know gnome-disks has that option and I use it all the time with my external sata USB controller. > 2. sync You could do that before unmount, but unmount will also do that for you. No need to do this afterward. > 3. hdpram -S 30 /dev/sdX (I'm not sure if does anything honestly because > device is connected over a sata to usb interface) What does this do? Why "sleep" the drive? > 4. Wait for ~20 minutes Huh? Why 20 minutes? Just unmount and then power off the device, that should be sufficient. good luck! greg k-h
