how to load bcache over raid before fsck?

[ktsaou]

Hi all,

I have a non-system filesystem that is:

BTRFS
-> on a BCACHE (with 512GB SSD for caching - though this is irrelevant)
-> on a MD RAID-1
-> on 2x 8TB HDDs

The problem is that the boot process does not "see this filesystem". So the system boots with this disk unmounted. fsck fails with unknown UUID.

So, I have added an rc.local script to mount it, but this is very annoying since several services that depend on this filesystem fail to start too.

I understand that somehow the boot process is not loading the bcache module on time.

This is an openrc system and I used genkernel to generate initramfs (yes, the bcache module is in initramfs - though I don't know how to force loading it before calling openrc).

Any ideas how to fix?


btw, netdata (https://my-netdata.io) monitors bcache (it provides statistics of bcache hit ratio, cache disk utilization, writeback, etc).