Public bug reported: If a bcache is created with a Curtis-Wright NVRAM card as caching device, the bcache device will not show up on boot without manual intervention.
Tracking this down show this being due to the fact, that line 9 of /lib/udev/rules.d/60-persistent-storage.rules filters on a whitelist of devices (loop*|mmcblk*[0-9]|msblk*[0-9]|mspblk*[0-9]|nvme*|sd*|sr*|vd*|xvd*|bcache*|cciss*|dasd*|ubd*), that doesn't include the NVRAM devices (umem*). A few steps later, this results in bcache_register() not being called. Trivially patching -KERNEL!="loop*|mmcblk*[0-9]|msblk*[0-9]|mspblk*[0-9]|nvme*|sd*|sr*|vd*|xvd*|bcache*|cciss*|dasd*|ubd*", GOTO="persistent_storage_end" +KERNEL!="loop*|mmcblk*[0-9]|msblk*[0-9]|mspblk*[0-9]|nvme*|sd*|sr*|vd*|xvd*|bcache*|cciss*|dasd*|ubd*|umem*", GOTO="persistent_storage_end" resolves the issue. ** Affects: ubuntu Importance: Undecided Status: New ** Description changed: - If a bcache is created not with a Curtis-Wright NVRAM card as caching + If a bcache is created with a Curtis-Wright NVRAM card as caching device, the bcache device will not show up on boot without manual intervention. Tracking this down show this being due to the fact, that line 9 of /lib/udev/rules.d/60-persistent-storage.rules filters on a whitelist of devices (loop*|mmcblk*[0-9]|msblk*[0-9]|mspblk*[0-9]|nvme*|sd*|sr*|vd*|xvd*|bcache*|cciss*|dasd*|ubd*), that doesn't include the NVRAM devices (umem*). A few steps later, this results in bcache_register() not being called. Trivially patching -KERNEL!="loop*|mmcblk*[0-9]|msblk*[0-9]|mspblk*[0-9]|nvme*|sd*|sr*|vd*|xvd*|bcache*|cciss*|dasd*|ubd*", GOTO="persistent_storage_end" +KERNEL!="loop*|mmcblk*[0-9]|msblk*[0-9]|mspblk*[0-9]|nvme*|sd*|sr*|vd*|xvd*|bcache*|cciss*|dasd*|ubd*|umem*", GOTO="persistent_storage_end" resolves the issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1635729 Title: bcache won't start on boot due to exotic block devices filtered in udev rules To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1635729/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs