Degraded zpool after failed PSU

[Patrick M. Hausen]

As you like. Of course resilvering and copying in parallel will slow both processss down, but the boot partitions are tiny, so no harm will come from that.

[FullyBorked]

Is the source wrong here dd if=/dev/da1p1 of=/dev/ada0p1 bs=1m?  I get "dd: /dev/da1p1: No such file or directory".   Assuming source should be /dev/ada1p1 but don't want to assume again.

[Patrick M. Hausen]

ada1p1, yes. Sorry.

Same for the second command. I fixed it in my original post.

I suggest you just delete that single full quote of my instructions from your first reply, then the thread will be both correct and readable.

[FullyBorked]

ada1p1, yes. Sorry.

ok, copies are done.  Waiting on resilver to finish, estimated to be about an hour. 

Appreciate the detailed guidance. If you have a way to accept it, I'd be happy to buy you a beer or coffee/tea depending on your elixir of choice for your trouble. 

[Patrick M. Hausen]

All good. I'd be interested into those guides you mentioned. If there is misleading documentation out there, we ought to do something about that.

EDIT: I just found this one:

https://docs.freebsd.org/en/books/handbook/zfs/

Ouch! Ouch, ouch, ouch! I'll address this in the next ZFS production users call on Wednesday.

[FullyBorked]

All good. I'd be interested into those guides you mentioned. If there is misleading documentation out there, we ought to do something about that.

https://sotechdesign.com.au/how-to-add-a-drive-to-a-zfs-mirror/

https://docs.oracle.com/cd/E53394_01/html/E54801/gayrd.html

https://askubuntu.com/questions/1301828/extend-existing-single-disk-zfs-with-a-mirror-without-formating-the-existing-hdd

https://www.devroom.io/2024/03/07/zfs-upgrade-single-disk-to-mirror/

I can go on and on, the issue is I didn't look up a freebsd specific guide. Figured ZFS was ZFS and a mirror is a mirror.  Ultimately I didn't know what I didn't know, so I guess my search was flawed.  But everything seemed to mostly agree, so figured that was the right path, and in my head a mirror is well... a mirror. I think in raid controller, on an old school RAID card I'd add in my disk, add it to the mirror, let it resilver/sync, go about my life and never think of it again.

Edit: I understand why this wouldn't have worked now, with a RAID controller, the OS and UEFI bootloader just points at the card instead of disks directly unlike ZFS.  I know know that boot info would have to exist on both disks in this instance.  IF it was just for storage I assume all that wouldn't be needed and the above guides would have been accurate.   

[Patrick M. Hausen]

Oracle ZFS docs apply to Oracle hardware (former Sun) only, neither Linux nor FreeBSD.

FreeBSD uses GPT partitions. As do Ubuntu and Debian, if you follow the guide by zfsbootmenu.org. If you follow the OpenZFS guide for Ubuntu, it's /dev/disk/by-id.

FreeNAS and TrueNAS use GUUIDs. It's complicated.

Now the fact that the FreeBSD handbook is so outdated it is blatantly wrong - does not match in any way what the FreeBSD installer will (correctly) do - needs to be addressed. I'll poke some people.

[FullyBorked]

Oracle ZFS docs apply to Oracle hardware (former Sun) only, neither Linux nor FreeBSD.

FreeBSD uses GPT partitions. As do Ubuntu and Debian, if you follow the guide by zfsbootmenu.org. If you follow the OpenZFS guide for Ubuntu, it's /dev/disk/by-id.

FreeNAS and TrueNAS use GUUIDs. It's complicated.

Now the fact that the FreeBSD handbook is so outdated it is blatantly wrong - does not match in any way what the FreeBSD installer will (correctly) do - needs to be addressed. I'll poke some people.

Confusing is the big key word here, I'm a slight noob with FreeBSD and a full on noob with ZFS I've just been lost this whole time.

Regardless I appreciate the help and guidance here.