curtin: Installation started. (18.1-1-g45564eef-0ubuntu1~16.04.1)
third party drivers not installed or necessary.
start: cmd-install/stage-partitioning/builtin/cmd-block-meta: curtin command block-meta
start: cmd-install/stage-partitioning/builtin/cmd-block-meta: removing previous storage devices
Running command ['mdadm', '--assemble', '--scan', '-v'] with allowed return codes [0, 1, 2] (capture=True)
mdadm assemble scan results:

mdadm: looking for devices for further assembly
mdadm: no recogniseable superblock on /dev/sda1
mdadm: Cannot assemble mbr metadata on /dev/sda
mdadm: no recogniseable superblock on /dev/sdb
mdadm: cannot open device /dev/sr0: No medium found
mdadm: no recogniseable superblock on /dev/loop0
mdadm: No arrays found in config file or automatically

Running command ['mdadm', '--detail', '--scan', '-v'] with allowed return codes [0, 1] (capture=True)
mdadm detail scan after assemble:


Running command ['udevadm', 'settle'] with allowed return codes [0] (capture=False)
Loading kernel module bcache via modprobe
Running command ['modprobe', '--use-blacklist', 'bcache'] with allowed return codes [0] (capture=False)
Loading kernel module zfs via modprobe
Running command ['modprobe', '--use-blacklist', 'zfs'] with allowed return codes [0] (capture=False)
modprobe: FATAL: Module zfs not found in directory /lib/modules/4.4.0-121-generic
finish: cmd-install/stage-partitioning/builtin/cmd-block-meta: FAIL: removing previous storage devices
finish: cmd-install/stage-partitioning/builtin/cmd-block-meta: FAIL: curtin command block-meta
Traceback (most recent call last):
  File "/curtin/curtin/commands/main.py", line 201, in main
    ret = args.func(args)
  File "/curtin/curtin/commands/block_meta.py", line 52, in block_meta
    meta_custom(args)
  File "/curtin/curtin/commands/block_meta.py", line 1368, in meta_custom
    clear_holders.start_clear_holders_deps()
  File "/curtin/curtin/block/clear_holders.py", line 579, in start_clear_holders_deps
    util.load_kernel_module('zfs')
  File "/curtin/curtin/util.py", line 327, in load_kernel_module
    subp(['modprobe', '--use-blacklist', module])
  File "/curtin/curtin/util.py", line 263, in subp
    return _subp(*args, **kwargs)
  File "/curtin/curtin/util.py", line 131, in _subp
    cmd=args)
curtin.util.ProcessExecutionError: Unexpected error while running command.
Command: ['modprobe', '--use-blacklist', 'zfs']
Exit code: 1
Reason: -
Stdout: ''
Stderr: ''
Unexpected error while running command.
Command: ['modprobe', '--use-blacklist', 'zfs']
Exit code: 1
Reason: -
Stdout: ''
Stderr: ''
curtin: Installation failed with exception: Unexpected error while running command.
Command: ['curtin', 'block-meta', 'custom']
Exit code: 3
Reason: -
Stdout: start: cmd-install/stage-partitioning/builtin/cmd-block-meta: curtin command block-meta
        start: cmd-install/stage-partitioning/builtin/cmd-block-meta: removing previous storage devices
        Running command ['mdadm', '--assemble', '--scan', '-v'] with allowed return codes [0, 1, 2] (capture=True)
        mdadm assemble scan results:
        
        mdadm: looking for devices for further assembly
        mdadm: no recogniseable superblock on /dev/sda1
        mdadm: Cannot assemble mbr metadata on /dev/sda
        mdadm: no recogniseable superblock on /dev/sdb
        mdadm: cannot open device /dev/sr0: No medium found
        mdadm: no recogniseable superblock on /dev/loop0
        mdadm: No arrays found in config file or automatically
        
        Running command ['mdadm', '--detail', '--scan', '-v'] with allowed return codes [0, 1] (capture=True)
        mdadm detail scan after assemble:
        
        
        Running command ['udevadm', 'settle'] with allowed return codes [0] (capture=False)
        Loading kernel module bcache via modprobe
        Running command ['modprobe', '--use-blacklist', 'bcache'] with allowed return codes [0] (capture=False)
        Loading kernel module zfs via modprobe
        Running command ['modprobe', '--use-blacklist', 'zfs'] with allowed return codes [0] (capture=False)
        modprobe: FATAL: Module zfs not found in directory /lib/modules/4.4.0-121-generic
        finish: cmd-install/stage-partitioning/builtin/cmd-block-meta: FAIL: removing previous storage devices
        finish: cmd-install/stage-partitioning/builtin/cmd-block-meta: FAIL: curtin command block-meta
        Traceback (most recent call last):
          File "/curtin/curtin/commands/main.py", line 201, in main
            ret = args.func(args)
          File "/curtin/curtin/commands/block_meta.py", line 52, in block_meta
            meta_custom(args)
          File "/curtin/curtin/commands/block_meta.py", line 1368, in meta_custom
            clear_holders.start_clear_holders_deps()
          File "/curtin/curtin/block/clear_holders.py", line 579, in start_clear_holders_deps
            util.load_kernel_module('zfs')
          File "/curtin/curtin/util.py", line 327, in load_kernel_module
            subp(['modprobe', '--use-blacklist', module])
          File "/curtin/curtin/util.py", line 263, in subp
            return _subp(*args, **kwargs)
          File "/curtin/curtin/util.py", line 131, in _subp
            cmd=args)
        curtin.util.ProcessExecutionError: Unexpected error while running command.
        Command: ['modprobe', '--use-blacklist', 'zfs']
        Exit code: 1
        Reason: -
        Stdout: ''
        Stderr: ''
        Unexpected error while running command.
        Command: ['modprobe', '--use-blacklist', 'zfs']
        Exit code: 1
        Reason: -
        Stdout: ''
        Stderr: ''
        
Stderr: ''