On Tue, Jan 01, 2019 at 04:50:51PM +0100, Michael Biebl wrote:
> Am 31.12.18 um 00:04 schrieb Leo L. Schwab:
> > 'lsmod' prints nothing. /proc/modules is empty.
> >
> >> ls -la /dev
> >
> > No block devices appear to be listed. (Screen photos available upon
> > request.)
>
> Hm, this is very strange.
> Block devices such as /dev/sd? are directly created by the kernel and
> made available via devtmpfs. Mounting /proc and /dev is one of the first
> things done in
> /usr/share/initramfs-tools/init
> way before systemd-udevd is started.
> If you have no block devices at all, I'm at a loss what's going wrong.
>
What's going wrong is that there are no kernel modules loaded,
including 'ahci' which runs the SATA bus.
Just for laughs, I re-installed udev 240-2 and rebooted. As before,
the boot failed, leaving me at an initramfs prompt. 'lsmod' reported no
kernel modules loaded, and the directory /dev/disk did not exist.
I then ran 'modprobe ahci' at the command prompt, and immediately
heard some brief chattering from the disks. I then found the /dev/sd*
devices had been created, and the /dev/disk tree had been populated,
including /dev/disk/by-uuid. 'lsmod' now reported sd_mod, sr_mod, cdrom,
ahci, libahci, libata, and scsi_mod as loaded.
So, something that used to trigger kernel module loading isn't
happening anymore.
BTW, my rootfs is not encrypted, so 'cryptsetup' isn't involved.
Schwab
