ServerNet Cluster Manual

ServerNet Cluster Manual—520575-003
D-1
D
Service Categories for Hardware
Components
NonStop S-series hardware components fall into the service categories shown in
Table D-1.
Table D-1. Service Categories for Hardware Components (page 1 of 2)
Category CRU or FRU* Definition
Class 1 CRU
•
Disk drives
•
Power cords
•
Fans
A CRU that probably will not cause a partial or
total system outage if the documented
replacement procedure is not followed correctly.
Customers replacing a Class 1 CRU do not
require previous experience with replacing
NonStop S-series CRUs. However, for some
CRUs, customers must be able to use the tools
needed for the replacement procedure (these are
common tools) and must protect components from
electrostatic discharge (ESD).
Class 2 CRU
•
ECL ServerNet
cables
•
System
consoles
•
Tape drives
(some)
A CRU that might cause a partial or total system
outage if the documented replacement procedure
is not followed correctly. Customers replacing
Class 2 CRUs should have either three or more
months’ experience with replacing NonStop
S-series CRUs or equivalent training. Customers
must be able to use the tools needed for the
replacement procedure and must protect
components from ESD.
*The CRUs and FRUs listed do not represent a complete list of CRUs and FRUs used in NonStop S-series
servers.