On Sun, Aug 14, 2016 at 5:09 AM, Pavel Machek <pa...@ucw.cz> wrote: >> Use static (persistent) naming instead, /dev/disk/by-label, >> /dev/disk/by-id, /dev/disk/by-uuid, and if gpt /dev/disk/by-partlabel >> and /dev/disk/by-partuuid > > Explain that to my bootloader. Kernel needs root= on a command line.
It does need a root parameter. Use root=PARTUUID=<partition UUID>. Note the UUID is the PARTUUID from "blkid" which is for the partition, not the UUID field which is for the filesystem. >> As you found, /dev/sdX bus names are assigned in the order they are >> added, which for some time has not been guaranteed to remain >> consistent between kernel versions or even subsequent boots on the >> same kernel. > > Well, for usb, order is not guaranteed, for SATA, it worked. So that's > a regression in v4.8-rc1. > > Yes, /dev/disk/by-* is good idea, but this broke my boot, probably > broke some scripts that used for a long time... and kernel may not > break working systems. It's always possible others may disagree, but I don't think something is a regression when what breaks has long been said to not be expected to work.
