Same issue on fedora 25 on XPS 15 9560. Running kernel 4.8.6-300.fc25.x86_64
Disk: seagate 1TEAPF-500 (4TB drive)
Other usb drives spin down as expected.
Same issue on fedora 25 on XPS 15 9560. Running kernel 4.8.6-300. fc25.x86_ 64
Disk: seagate 1TEAPF-500 (4TB drive)
Other usb drives spin down as expected.