Public bug reported: I installed focal about a month about, using the desktop installer with the 'experimental' ZFS root option. I've been running ZFS on FreeBSD for about 10 years and figured I could handle any sharp edges. It's installed to a single 2TB SSD - no RAID, no L2ARC/ZIL, no dedup, nothing complicated. Machine is an Intel S2600CP2, 2x E5-2670 v1, 128GiB RAM.
The machine stayed up for a few weeks, until I had cause to physically move it and so shut it down. It turned out GRUB had installed onto the wrong disk which I'd removed in the intervening time. It wouldn't boot, so I booted the focal desktop installer from a USB stick to give me a shell to fix things. I didn't run the actual installer, I just booted to the installer desktop and then did Ctrl-Alt-F1, apt install openssh- server, and then logged in via SSH. Then I followed some instructions about mounting the pool in a chroot (Step 3): https://askubuntu.com/questions/826209/re-initialise-grub-for-non-bootable-uefi-zfs-16-04-installation This took a couple of goes to get right as the first time I tried to mount on top of the installer (without zpool import -R) and many filesystems couldn't replace preexisting mounts, so I exported and re-imported. Anyway, I succeeded in mounting, and then doing update-grub. However, looking at the zpool history -il log while I was in the installer I see: (full zpool history -il log attached) 2020-06-16.14:56:34 [txg:889337] open pool version 5000; software version unknown; uts ubuntu 5.4.0-26-generic #30-Ubuntu SMP Mon Apr 20 16:58:30 UTC 2020 x86_64 [on ubuntu] 2020-06-16.14:56:34 [txg:889339] import pool version 5000; software version unknown; uts ubuntu 5.4.0-26-generic #30-Ubuntu SMP Mon Apr 20 16:58:30 UTC 2020 x86_64 [on ubuntu] 2020-06-16.14:58:20 zpool export rpool bpool [user 0 (root) on ubuntu:linux] 2020-06-16.14:59:16 [txg:889372] open pool version 5000; software version unknown; uts ubuntu 5.4.0-26-generic #30-Ubuntu SMP Mon Apr 20 16:58:30 UTC 2020 x86_64 [on ubuntu] 2020-06-16.14:59:16 [txg:889374] import pool version 5000; software version unknown; uts ubuntu 5.4.0-26-generic #30-Ubuntu SMP Mon Apr 20 16:58:30 UTC 2020 x86_64 [on ubuntu] 2020-06-16.15:01:32 [txg:889402] destroy rpool/ROOT/ubuntu_rjlt3b/var/log@autozsys_1gwqtf (19222) [on ubuntu] 2020-06-16.15:01:32 ioctl destroy_snaps input: snaps: rpool/ROOT/ubuntu_rjlt3b/var/log@autozsys_1gwqtf [user 0 (root) on ubuntu:linux] ...lots of snapshots are deleted... 2020-06-16.15:05:55 [txg:889577] destroy rpool/USERDATA/root_tavly8@autozsys_1gwqtf (19722) [on ubuntu] 2020-06-16.15:06:00 ioctl destroy_snaps input: snaps: rpool/USERDATA/root_tavly8@autozsys_1gwqtf 2020-06-16.15:06:45 [txg:889588] destroy rpool/USERDATA/local/vm/freebsd-12.1 (3398) [on ubuntu] 2020-06-16.15:06:45 [txg:889590] destroy rpool/USERDATA/local/vm (735) [on ubuntu] 2020-06-16.15:06:46 [txg:889592] destroy rpool/USERDATA/local/ecad/altera (551) [on ubuntu] 2020-06-16.15:06:46 [txg:889594] destroy rpool/USERDATA/local/ecad/xilinx (3476) [on ubuntu] 2020-06-16.15:06:47 [txg:889596] destroy rpool/USERDATA/local/ecad (127) [on ubuntu] 2020-06-16.15:06:48 [txg:889598] destroy rpool/USERDATA/local/scratch/atm26 (2058) [on ubuntu] 2020-06-16.15:06:48 [txg:889600] destroy rpool/USERDATA/local/scratch (2447) [on ubuntu] 2020-06-16.15:06:49 [txg:889602] destroy rpool/USERDATA/local (1671) [on ubuntu] 2020-06-16.15:07:20 [txg:889668] destroy rpool/USERDATA/opt_tavly8/riscv (1878) [on ubuntu] 2020-06-16.15:07:21 [txg:889670] destroy rpool/USERDATA/opt_tavly8/brave.com (1864) [on ubuntu] 2020-06-16.15:07:23 [txg:889672] destroy rpool/USERDATA/opt_tavly8/riscv-llvm (4788) [on ubuntu] 2020-06-16.15:07:24 [txg:889674] destroy rpool/USERDATA/opt_tavly8/riscv-freebsd (5147) [on ubuntu] 2020-06-16.15:07:25 [txg:889676] destroy rpool/USERDATA/opt_tavly8 (3313) [on ubuntu] Here something that wasn't the command line - and so I assume is zsys - deleted all the datasets I made in rpool/USERDATA. This was about 1TiB of data. Needless to say, nothing should be destroying user datasets. root@mesozoic:/# lsb_release -rd Description: Ubuntu 20.04 LTS Release: 20.04 root@mesozoic:/# apt-cache policy zsys zsys: Installed: 0.4.5 Candidate: 0.4.5 Version table: *** 0.4.5 500 500 http://ubuntu.mirrors.uk2.net/ubuntu focal/main amd64 Packages 100 /var/lib/dpkg/status root@mesozoic:/# dpkg --list | grep zfs ii libzfs2linux 0.8.3-1ubuntu12 amd64 OpenZFS filesystem library for Linux ii zfs-initramfs 0.8.3-1ubuntu12 amd64 OpenZFS root filesystem capabilities for Linux - initramfs ii zfs-zed 0.8.3-1ubuntu12 amd64 OpenZFS Event Daemon ii zfsutils-linux 0.8.3-1ubuntu12 amd64 command-line tools to manage OpenZFS filesystems ** Affects: zfs-linux (Ubuntu) Importance: Undecided Status: New ** Attachment added: "Output of zpool history -il" https://bugs.launchpad.net/bugs/1883887/+attachment/5384707/+files/zpool-history-il.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1883887 Title: Focal installer destroyed my datasets To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1883887/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
