So I got the ps2 adapter and... it looks like this has nothing to do with ZFS.
I have 4 SATA drives in this machine. sda - ST2000DM001-1ER1 - zpool storage sdb - ST2000DM008-2FR1 - zpool storage sdc - Samsung SSD 860 - my main drive. zpool rpool and bpool. sdd - Samsung SSD 850 - windows - used with vfio + qemu. (This is also where my kernel commandline arguments are coming from, isolating one gpu and a usb controller. The iommu groups are clean and only contains the gpu+usb controller, nothing else). When in the crashkernel, I can see: sda and sdb. Which now translates into the Samsung ssd 850 and one of the storage pool drives. So half of my storage pool and the windows drive. The 2 other sata drives are not there. And I see a lot of errors for ata5.00: failed to IDENTIFY (I/O error, err_mask=0x100) The motherboard is a MSI X99A SLI PLUS. I'm.. happy with closing this issue at this point. If there's anything quick I can do to help debug this absolutely. But I feel like this moved from a category of "zfs initrd script needs patching" into "weird motherboard bug" - in a motherboard I'm planning to replace anyway. ** Attachment added: "picture of whats going on" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1913639/+attachment/5461871/+files/full-log.jpg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1913639 Title: linux-crashdump is not capable of mounting zfs root pools To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1913639/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs