Don't attempt to set the read or write caches on usb disks. It breaks at least one previously working device, as discovered by naddy@. dlg@ confirmed other kernels also avoid attempting this operation on usb disks.
Don't attempt to set the read or write caches on usb disks. It
breaks at least one previously working device, as discovered by
naddy@. dlg@ confirmed other kernels also avoid attempting this
operation on usb disks.

ok dlg@ deraadt@

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars