Description

While the first boot works fine after the installation, following reboots get stuck in the initramfs because the root partition cannot be found. Reloading the ahci kernel module resolves this.

Impact

Flatcar Container Linux is not working on these instances (and maybe others).

Environment and steps to reproduce

1. Set-up: Select Flatcar for a c3.medium instance on Packet
2. Task: Reboot
3. Action(s): Login via the OOB console and wait for the dracut shell after some minutes (up to 15) and press Enter (only 5 minutes time) to enter the shell which shows that /dev/disk-by-label is empty
   a. To resolve this, unload and load the ahci module, check that /dev/disk-by-label has the root partition, then exit to continue the boot
4. Error: This seems to be the related error message: ata10.00: both IDENTIFYs aborted, assuming NODEV

Expected behavior
The module works so that the root partition can be found

Additional information
@marga-kinvolk Did I miss something?