Comment 49 for bug 1751813

So my current feelings about this are as follows:

udev-udeb should ship /lib/modprobe.d/ directory

It should contain systemd.conf, just like the deb udev package, which sets bonding max_bonds=0 and dummy numdummies=0.

It should also contain scsi-scan-sync.conf that that sets `options scsi_mod scan=sync`

This way, when hw-detect runs `update-dev` and `update-dev --settle` all the scsi module loading will be blocking said sync points correctly, using the scsi kernel built-in scan timeouts etc.

Potentially no disks found menu, needs an option to "Rescan all SCSI drives again".