Biographical Sketch: Stefan Reimbold works as development engineer at the IBM Research & Development lab in Boeblingen, Germany. He has 15 years of experience in the UNIX field and has been working for IBM for more than 10 years. He holds a Ph.D. in Physics from the University of Heidelberg and is experienced lecturer at the Baden-Wuerttemberg Cooperative State University. His areas of expertise include System z Firmware, Linux on System z, Networking, AIX and AFS.