Szerteszana²

modprobe: module tapes not found

If you upgrade a long-running Debian/Linux to kernel 3.x.x and your system doesn't boot, because you boot from an mdraid (like raid1) device, and you see the error

modprobe: module tapes not found
modprobe: module discs not found
modprobe: module cdroms not found

and you end up in (initramfs), then do that:

1. Do Not Panic!
2. cd /etc/modprobe.d/
3. rm devfsd.conf    (we do not use devfs anymore, really)
   
4. modprobe raid1   (or whatever you need, raid5 raid10 or any dm / md devices)
5. mdadm --assemble --scan   (and hope you did configure your mdadm.conf right the last time :-))
6. CTRL-D

And after start do the same on the system and recreate the initrd....