In Comment #3, I noted that it was mysterious that we were seeing this at all on the reported system - but, after staring at the log, I think I've an explanation for that now.
This system is supposed to be configured to have 8 identical NVMe drives in a raid0 mounted at /raid. There are also 2 other NVMes in this system which are supposed to have partitions configured in a raid1 for /. At least, that is what was *supposed* to be the case. A filtered version of the log in comment #1 shows: [ 16.757165] md/raid0:md0: cannot assemble multi-zone RAID0 with default_layout setting [ 16.757165] md/raid0: please set raid.default_layout to 1 or 2 [ 16.757166] md: pers->run() failed ... [ 19.051379] md1: detected capacity change from 0 to 30724962910208 [ 72.720232] md/raid0:md0: cannot assemble multi-zone RAID0 with default_layout setting [ 72.728149] md/raid0: please set raid.default_layout to 1 or 2 [ 72.733979] md: pers->run() failed ... While not explicit, we see that md1 is ginormous - matching the capacity we'd expect for the 8 drive raid0 that's supposed to be mounted at /raid. However, the md/raid0 driver is actually complaining about md*0*. I'm guessing that md0 is the array of 2 partitions that was supposed to be a raid1 mounted at /, but was misconfigured as a raid0. And it therefore makes sense that it is a multi-zone array, as we see that only one NVMe seems to be partitioned: [ 16.541847] nvme1n1: p1 p2 Presumably nvme1n1p1 is used as the EFI System Partition, and presumably nvme1n1p2 was combined with the full nvme0 block device to form a heterogenous raid0, which would therefore be multi-zone. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1849682 Title: [REGRESSION] md/raid0: cannot assemble multi-zone RAID0 with default_layout setting To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-release-notes/+bug/1849682/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
