NonStop System Glossary

Class-1 CRU
(NonStop S-series server only) A customer-replaceable unit (CRU) that probably will not cause a
partial or total system outage if the documented replacement procedure is not followed correctly.
Customers replacing Class-1 CRUs are not required to have previous experience replacing NonStop
S-series CRUs. However, for some CRUs, customers must be able to use the tools needed for the
replacement procedure (which are common tools) and must protect components from electrostatic
discharge (ESD).
Class-2 CRU
(NonStop S-series server only) A customer-replaceable unit (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 of experience 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 electrostatic discharge (ESD).
Class-3 CRU
(NonStop S-series server only) A customer-replaceable unit (CRU) that probably will cause a partial
or total system outage if the documented replacement procedure is not followed correctly. Customers
replacing Class-3 CRUs should have either six or more months of experience replacing NonStop
S-series CRUs or equivalent training. Customers must be able to use the tools needed for the
replacement procedure, must protect components from electrostatic discharge (ESD), and must
understand the dependencies involved in NonStop S-series CRU-replacement procedures, such as
disk-path switching. Replacement by a service provider trained by HP is recommended.
CLI
command line interface.
client
A software process, hardware device, or combination of the two that requests services from a
server. Often, the client is a process residing on a programmable workstation and is the part of
an application that provides the user interface. The workstation client might also perform other
portions of the application logic.
client application
An application that requests a service from a server application. Execution of remote procedure
calls is an example of a client application.
client (of a loadable library)
A loadfile that uses functions or data from a library.
CLIM
See CLuster I/O Module (CLIM) .
climcmd
A command line interface for issuing commands from the NonStop host system to the CLIM.
climconfig
A command option to the climcmd command line interface that allows you to configure I/O protocol
and device characteristics.
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