Created attachment 654815 [details]
All in a VM with a 15GB and a 10GB disk, all LVM, all with Beta (18.29.2)
I did an F18 Beta software RAID-1 install (custom part, wipe all partitions, auto-create partitions, then change / to be softRAID1), then an autopart two-disk install over the top of that, to try and reproduce 876789. It didn't - the autopart two-disk install worked. When it completed, without rebooting, I switch to ctrl-alt-f2 and did parted /dev/vda; mklabel; parted /dev/vdb; mklabel . Then I removed the second disk (so I'm down to just one 15GB disk), and did an autopart encrypted F18 Beta install. It hit this bug at the start of partitioning.
Bug got marked as a dupe of 870586 , but the tb is clearly different.
Any time you run mklabel on a disk with lvm on the partitions you are asking for trouble.
What we need to do now is decide how to disable the lvm udev rules that appeared recently, which auto-activate any and all lvm that appears in the system.
Since you didn't do anything to actually remove the lvm metadata, the last automatic partitioning set the pv at the exact same place on disk as previously, which triggered those lvm udev rules before we could clear the partition's contents.
so does the request from some other bug (I forget which) to try it with the new lvm2 build apply here? presumably. I guess I should just build an image with the new lvm2 and dick around with it for a while, but negative results ("it doesn't crash") are so inconclusive...sigh.
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