3-8 Sun Ultra 45 and Ultra 25 Workstations Service and Diagnostics Manual • May 2006
4. Set the DIMM aside on an antistatic mat.
5. Repeat Step 2 through Step 4 until you have removed all relevant DIMMs.
3.2.4 Installing the DIMMs
Caution – If you are installing additional memory, remember that DIMMs must be
installed in matched pairs of DIMMs (
FIGURE 3-4). The workstation requires a
minimum of one pair of matching DIMMs.
The minimum OpenBoot Prom level for the Sun Ultra 45 or Ultra 25 workstations is
OpenBoot 4.21.x. Before installing Sun Ultra 45 and Ultra 25 memory, verify that the
latest versions of OpenBoot PROM, system firmware, and recommended system
patches are installed on your system. If necessary, check the Sun System Handbook at
SunSolve Online:
http://sunsolve.sun.com/handbook_pub/
Note – If your Ultra 45 workstation has two CPUs and four DIMMs, the
workstation operates most efficiently with two DIMMs per CPU. DIMM connectors
are color-coded blue and black. You must install DIMMs in pairs in the same color
connectors.
Caution – Use proper ESD grounding techniques when handling components. Wear
an antistatic wrist strap and use an antistatic mat. Store ESD-sensitive components in
antistatic bags before placing them on any surface.
Caution – Do not remove any DIMM from its antistatic package until you are ready
to install it.
1. Power off the system, attach an antistatic wrist strap, open and position the
chassis, and remove the access panel.
Refer to “Powering Off the Workstation” on page 2-4.
2. Remove the new DIMM from its antistatic container.
Caution – Handle DIMMs only by the edges. Do not touch DIMM components or
metal parts. Always wear an antistatic wrist strap when handling DIMMs.
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