On Fri, 2020-10-16 at 15:16 +0200, Lennart Poettering wrote: > So the btrfs ready ioctl is called and the device considered by the > kernel btrfs implementation to be ready > (i.e. assembled from all component devices) with this line: > > [ 27.804250] systemd-udevd[712]: sde: > /usr/lib/udev/rules.d/64-btrfs.rules:15 RUN '/usr/bin/udevadm trigger -s > block -p ID_BTRFS_READY=0' > > (that's line 35792) > > And srv.mount then later mounts the thing correctly. > > Where's the problem supposed to be be? > I will try and summarise the situation in one message to help make things clear. Here is a summarised history of the problem:
1. The original problem: A 10 HDD BTRFS volume with 4 drives connected to the motherboard and 6 drives connected to the HBA *fails* to mount automatically at boot time. The log for this (without any special debugging options set in grub) is here: https://drive.google.com/file/d/1o1-7smQAjg3LKP98EFfeHbb_jZdNz_jT/view?usp=sharing 2. Debugging with "rd.udev.debug systemd.log_level=debug": The same 10 HDD BTRFS volume with 4 drives connected to the motherboard and 6 drives connected to the HBA *fails* to mount automatically at boot time. The log for this with "rd.udev.debug systemd.log_level=debug" set in grub is here: https://drive.google.com/file/d/1jVHjAQ8CY9vABtM2giPTB6XeZCclm7R-/view?usp=sharing 3. Debugging with "udev.log_priority=debug systemd.log_level=debug": The same 10 HDD BTRFS volume with 4 drives connected to the motherboard and 6 drives connected to the HBA *correctly* mounts automatically at boot time. The log for this with "udev.log_priority=debug systemd.log_level=debug" set in grub is here: https://drive.google.com/file/d/1-x26JS5gcZxwZx7zWoKduEg9ycwUHKqO/view?usp=sharing This was the one you were looking at which caused you to ask "Where's the problem supposed to be be?" 😉 4. Changing HDD connections: When I changed the hard drive connections so that all 10 HDDs are connected via the HBA the BTRFS volume *correctly* mounts automatically at boot time. I hope that is a bit clearer. So although putting all the HDDs on the HBA seems to fix the problem for me. I thought that I should report my findings. Thank you for all your time and effort looking into this. Best wishes, Dan
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