Am 18.04.24 um 09:31 schrieb Li Nan:
在 2024/4/14 5:37, Sven Köhler 写道:
[...]
I used your command and config, updated kernel and mdadm, but raid also
created correctly after reboot.
My OS is fedora, it may have been affected by some other system tools? I
have no idea.
The Arch kernel has RAID autodetection enabled. I just tried to
reproduce it. While mdadm will not consider /dev/sd[ab] as members,
the kernel's autodetection will. For that you have to reboot.
It is not about autodetection. Autodetection only deals with the devices in
list 'all_detected_devices', device is added to it by blk_add_partition().
So sdx will not be added to this list, and will not be autodetect.
I apologize. It's not the kernel autodetection. Arch Linux is using udev
rules to re-assemble mdadm array during boot. The udev rules execute
/usr/bin/mdadm -If $name
where $name is likely a device like /dev/sda. I'm not sure yet whether
the udev rules have changed or mdadm has changed.
I will continue digging.
