On Thu, 3 Dec 2015, brad wrote: > It seems to be permanent? After reboot I still have this and I can > mount the drive > > dt1:cat /sys/block/sdb/device/scsi_disk/4\:0\:0\:0/cache_type > write through I don't understand. The change you make by writing to the sysfs file is not permanent. It will reset on every reboot and also every time you unplug and replug the drive. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html