Am 16.03.21 um 20:25 schrieb Michael Biebl:
What you see are the default permissions of the devices. Once the device is marked as ready by the kernel and a uevent is emitted, udev will run its rules and apply the permissions. In this case# grep btrfs-control /lib/udev/rules.d/*/lib/udev/rules.d/50-udev-default.rules:KERNEL=="btrfs-control", GROUP="disk"You can manually trigger a uevent by e.g. echo change > /sys/class/misc/btrfs-control/uevent Has systemd-udev-trigger.service been run successfully during boot?
For devices which have been initialized by the kernel before udev was started, we coldplug them via "udevadm trigger", which sends a change uevent and should make sure all udev rules are applied.
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