Problem with setup-storage preserving an existing LVM over RAID volume

[Thomas Lange]

>>>>> On Mon, 07 Jan 2019 22:45:18 +0100, Christian Meyer <c2h5oh at web.de> said:

    > INTERNAL ERROR in setup-storage:
    > convert_unit 1,81TiB
    > Please report this error to the Debian Bug Tracking System.
    >  at /usr/share/fai/setup-storage/Parser.pm line 379.
    > 	FAI::convert_unit("1,81TiB") called at /usr/share/fai/setup-
    > storage/Volumes.pm line 416
This is a bug we fixed in 5.7.3, see #909318.
So please try a newer FAI version. But I'm not sure if this will also
fix your other problems.

I'm not sure if anyone ever tried to preserve LVM over RAID and had success.
-- 
regards Thomas