====== Device Juggeling after every boot ======

===== Problem: =====

After every boot the devices (/dev/sd[a-z]) are not in order of hardware-slots, in short: The assignment of /dev/sd* was permanent altered (by least two devices!), eg:

<code>
# demo out from df
Filesystem      ... Mounted on
/dev/sda2       ... /mount/sda2
/dev/sdb1       ... /mount/sdc1
/dev/sdc1       ... /mount/sdf1
/dev/sdd1       ... /mount/sdd1
/dev/sde1       ... /mount/sde1
/dev/sdf9       ... /mount/sdb9
</code>

==== What happend? ====

Some kernel commits (like: 08fb080 "Update config files: make SCSI/ATA drivers modules again"), affects the order in which drivers are initialized. In particular, USB devices may now be scanned first.


===== Solution: =====

For the solution, after Kernel 6.4.x (Tumbleweed tested OK since: 2023-10-28), 5,14,x (Leap tested OK since: 2023-10-28), do this:

  echo 'softdep scsi_mod post: sd_mod sg' >>/etc/modprobe.d/sd.conf
  less /etc/modprobe.d/sd.conf # check the file
  dracut -f --regenerate-all
  reboot

This shure to load the SCSI driver first again.

For checking usefull commands:

  lsblk -f
  fdisk -l

See also more documentation on:
  * https://bugzilla.suse.com/show_bug.cgi?id=1216070#c26

May usefull too:
  * http://wiki.blue-panel.com/index.php/Fstab_-_Use_SystemD_automount_(de)