User-Agent:       Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:59.0) Gecko/20100101 Firefox/59.0
Build Identifier: 

When attempting to start Anaconda on the Fedora 28 Workstation Live CD, it immediately crashes with the following stacktrace (plus some extra bits above and below it):
```
[liveuser@localhost-live ~]$ liveinst
RAID set "pdc_eebfbibac" already active
RAID set "pdc_eebfbibac" was not activated
Traceback (most recent call last):
  File "/usr/lib64/python3.6/site-packages/gi/overrides/BlockDev.py", line 798, in wrapped
    ret = orig_obj(*args, **kwargs)
GLib.Error: g-bd-dm-error-quark: Failed to activate the RAID set 'pdc_eebfbibac' (3)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/bin/anaconda-cleanup", line 82, in <module>
    devicetree.populate(cleanup_only=True)
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/populator/populator.py", line 412, in populate
    self._populate()
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/populator/populator.py", line 462, in _populate
    self.handle_device(dev)
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/populator/populator.py", line 275, in handle_device
    self.handle_format(info, device)
  File "/usr/lib/python3.6/site-packages/blivet/threads.py", line 53, in run_with_lock
    return m(*args, **kwargs)
  File "/usr/lib/python3.6/site-packages/blivet/populator/populator.py", line 303, in handle_format
    helper_class(self, info, device).run()
  File "/usr/lib/python3.6/site-packages/blivet/populator/helpers/dmraid.py", line 69, in run
    blockdev.dm.activate_raid_set(rs_name)
  File "/usr/lib64/python3.6/site-packages/gi/overrides/BlockDev.py", line 824, in wrapped
    raise transform[1](msg)
gi.overrides.BlockDev.DMError: Failed to activate the RAID set 'pdc_eebfbibac'
Starting installer, one moment...
anaconda 28.22.11-1.fc28 for Fedora 28 started.
 * installation log files are stored in /tmp during the installation
 * shell is available on TTY2 and in second TMUX pane (ctrl+b, then press 2)
 * when reporting a bug add logs from /tmp as separate text/plain attachments
RAID set "pdc_eebfbibac" already active
RAID set "pdc_eebfbibac" was not activated

(anaconda:4364): PkGtkModule-WARNING **: 18:32:01.177: Error connecting to PK session instance: Connection is closed
```
This happend with the version that came with it (I don't recall which) as well as after upgrading to 28.22.11-1.fc28 via `dnf upgrade anaconda`.

Some info on the relevant parts of my system:
* Motherboard: GA-78LMT-USB3 (BIOS, no UEFI if that makes a difference)
* RAID Controller integrated in MB: Give me a minute to find out and add a comment.
* RAID Setup: 2 WD Blue 1TB HDDs in RAID0, one lonely 250GB Hitachi HDD
* CPU: AMD Phenom II X4 965


Reproducible: Always

Steps to Reproduce:
1. Grab and burn / flash a Fedora 28 Live CD
2. Run it on a machine with, I'm guessing, some certain RAID controller 
3. Start Anaconda
Actual Results:  
The program hangs for a few seconds, before two "An unkown error has occured"-boxes pop up.

Expected Results:  
No crash.