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Description of problem:
If there is a "fake" raid device on the system, anaconda tries to install the dmraid package, which is not available in RHEL-8:

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/considerations_in_adopting_rhel_8/file-systems-and-storage_considerations-in-adopting-rhel-8#the-dmraid-package-has-been-removed_file-systems-and-storage

The installation is interrupted, waiting for the user to ignore the package installation request.

Version-Release number of selected component (if applicable):
RHEL-8.2
anaconda-29.19.2.17-1.el8

How reproducible:
Always

Steps to Reproduce:
1. Run installation on a system with "fake/bios" RAID

Actual results:
Interrupted installation

Expected results:
Installation completes without asking for ignoring non-existing packages.

PR: https://github.com/rhinstaller/anaconda/pull/2495

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (anaconda bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:4729