NonStop S-Series System Expansion and Reduction Guide

Reducing a System Online
HP NonStop S-Series System Expansion and Reduction Guide—522465-009
4-8
5. Prepare and Stop Devices and Processes
5. Prepare and Stop Devices and Processes
Because you must maintain access to the system after you have stopped or moved all
devices, processes, and their communication paths, the TACL process you use for the
following steps should run in group 01. For this reason, use the startup TACL process
for system reduction.
Step Action
1. Using OSM or TSM and Worksheet 8, collect information about the following
devices in the enclosure to be removed:
•
Internal disk drives
•
Adapters (in direct or indirect communication with devices):
°
ServerNet adapters
°
SEBs or MSEBs (This information is used only for determining
communication paths. SEBs and MSEBs are not moved or terminated.)
•
SWAN concentrators
•
External tape drives
•
Open SCSI devices
For IOAM enclosures, collect information about ServerNet Switch Boards, FCSAs,
and G4SAs on Worksheet 8a.
2. Identify any dependent processes and indirect communication paths before
removing an enclosure:
a. To identify currently running processes in a processor enclosure, use the
TACL STATUS command on that enclosure. For example:
> STATUS 8
b. Correlate the list of processes returned with the results of Step 4. Inventory
Enclosures to Be Removed on page 4-7.
c. Identify processes and paths that might be affected.
3. Terminate or move processes as necessary.
For Information About See
Establishing a startup TACL
connection
Start a Startup TACL Session
on page A-9
Examples of preparing and
stopping devices and their
associated processes
Appendix D, Stopping Devices and Processes
Documentation you might
need for your subsystems
Table D-1, References and Examples, on page D-1
Indirect communication paths Is the Enclosure Providing Critical Resources?
on page 3-4
Determining Communication Paths
on page 3-6