242 IBM eServer zSeries 900 Technical Guide
A.1 RAS concepts
How to avoid errors
Error prevention is accomplished by ensuring a high-quality z900 product design, using
reliable components in the product, and implementing an effective manufacturing test
process. The z900 is built using only high-reliability components.
Error prevention is the effort to reduce or eliminate completely the number of errors and
defects that could occur in the field. This effort begins while the server is still in the concept
stage and continues through the design, development, and manufacturing phases. This is a
critical step because:
It reduces the number of high-severity server-impact events.
It reduces the complexity of recovery design and the number of recover ...