I have a set up like this to boot:

GRUB - access non-encrypted EFI partition to find kernel, initramfs, etc
initramfs has enough on it to boot minus the encryption key
(Removable) storage must be inserted (UUID matching) to:
- mount to expected point
- use key to decrypt root partition (systemd job in the first systemd
launched within initramfs)

This set up works, but it has one annoying thing coming from systemd
after initramfs is done.

When I take out the flash drive after booting up, I continuously get a
message that the flash drive wants to be mounted again.

Nov 16 00:01:52 limelight systemd[1]:
dev-disk-by\x2duuid-BD3B\x2d03BD.device: Job
dev-disk-by\x2duuid-BD3B\x2d03BD.device/start timed out.
Nov 16 00:01:52 limelight systemd[1]: Timed out waiting for device
Silicon-Power16G CHUAN.
Nov 16 00:01:52 limelight systemd[1]: Dependency failed for /mnt/chuan.
Nov 16 00:01:52 limelight systemd[1]: mnt-chuan.mount: Job
mnt-chuan.mount/start failed with result 'dependency'.
Nov 16 00:01:52 limelight systemd[1]:
dev-disk-by\x2duuid-BD3B\x2d03BD.device: Job
dev-disk-by\x2duuid-BD3B\x2d03BD.device/start failed with result 'timeout'.

I think this is because of the entry in /etc/fstab.

Anyone have a similar issue? And how can I fix this in Dracut?

Thanks
Andrew