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this post was submitted on 21 Jun 2026
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Usually raid and decryption happen in the initram. This is because these are too complex to sit purely in the kernel, requiring userspace tools like cryptsetup, but you want to be able to boot off of them so they have to be handled before the disk is mounted.
Usually that initram is dracut. Why dracut only partially completes the process here, likely figuring out the raid but not decryption, is anyones guess. In my experience dracut is quite hard to debug and configure.
The simplest approach is probably to just eat it and write a startup service that does it. Basically a startup command. No need to worry about timing, as when the initram finishes the raid should already be up.
There might be a prebuilt systemd service for it too iirc...
If you really wanns go for it, there are other initram systems like ugrd, which are easier to configure and might figure your setup out properly. But you'll probably have to manually install and update them. That would definitely be a very involved approach.
There are some guesses I made here on your boot timeline. If you show your dmesg I can confirm if the raid really comes up at initramfs time. But it should be s solid bet.