Oracle SPARC M7, Service Manual

Page: 189 / 330

Servicing Switch Units
In SPARC M7-16 servers, switch units are part of the scalability feature that enables a PDomain
to control DCUs. Switch units are configured to work together as a single unit. If a switch unit
fails, the server will operate in degraded mode. At least five switch units must be functioning
for the server to operate.
Replace a failed switch unit as soon as possible.
For the location of the six switch units, see “Switch Chassis Rear Components (SPARC
M7-16)” on page 25 .
Caution -
This procedure requires that you handle components that are sensitive to electrostatic
discharge. This discharge can cause server components to fail. Follow antistatic precautions to
prevent electrostatic damage. See “Prevent ESD Damage” on page 61 .
These topics explain how to service switch units.
Description Links
Learn about switch unit LEDs. “Switch Unit LEDs” on page 190
Prepare to remove a switch unit. “Prepare a Switch Unit for Removal” on page 191
Replace a switch unit. “Remove a Switch Unit” on page 194
“Install a Switch Unit” on page 197
Unseat or reseat a switch unit as part of
another component's service operation.
“Unseat a Switch Unit” on page 192
“Reseat a Switch Unit” on page 196
Related Information
■
“Identifying Components” on page 15
■
“Detecting and Managing Faults” on page 35
■
“Preparing for Service” on page 57
■
“Controlling the Server and Domains” on page 67
Servicing Switch Units 189