Quoting Les Mikesell lesmikesell@gmail.com:
Linux for years did. Their install is particularly interesting - if you install on a single-drive machine it will build a 'broken' RAID1 so at any later time you can add a second drive and easily mirror the existing install.
Now, that is something I always wanted to get going in ks.cfg. However, Anaconda pukes right away on any mention of "broken" mirror. One of the ideas I had was partitioning the disk and creating "broken" mirrors from preinstall script, and than attempting to use those to install, but I never got to testing it (should work).
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