Wow what a confusing error message, I'm sorry about this! This seems to be caused by the fact that both disks in the curtin config have the same wwn:
- {ptable: gpt, serial: Corsair_Force_GS_13207907000097410026, wwn: '0x0000000000000000', path: /dev/sda, preserve: true, name: '', grub_device: true, type: disk, id: disk-sda} - {ptable: gpt, serial: Corsair_Force_GS_1320790700009741003D, wwn: '0x0000000000000000', path: /dev/sdb, preserve: true, name: '', grub_device: true, type: disk, id: disk-sdb} This seems to come straight from the udev database: P: /devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0/0:0:0:0/block/sda ... E: ID_WWN=0x0000000000000000 E: ID_WWN_WITH_EXTENSION=0x0000000000000000 (and same for sdb). This in turn seems to be because SCSI_IDENT_LUN_NAA_LOCAL is 0000000000000000 (from 55-scsi-sg3_id.rules) for both drives and I'm fairly sure that's something sg_inq --export spits out but now we're really running into the limits of my knowledge I'm afraid. There's a bug somewhere, maybe in your drives firmware or maybe in sg3-utils... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1876848 Title: Installation of Focal on a linux raid consistently fails To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/subiquity/+bug/1876848/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs