LSRRB stands for Linux Software RAID - Redundant Boot. It is the official name for the Minnow/Guppy project.
This is the public accessible repositoy for LSRRB. You can get the binary package (rpm) from below URL:
http://downloads.linux.hpe.com/SDR/project/lsrrb/
Please check the user guide from below URL:
http://h20564.www2.hpe.com/hpsc/doc/public/display?docId=a00017763en_us (2017/Jun)
For errata found in the 2017/Jun User Guide, please see https://github.com/HewlettPackard/lsrrb/blob/master/Errata.md