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EK-70SIM-IN-A01

May 2000

2 pages

Original

43.6kB

Document:	Installing HSZ70 SIMMs
Order Number:	EK-70SIM-IN
Revision:	A01
Pages:	2
Original Filename:

OCR Text

Installing HSZ70 SIMMs
The HSZ70 cache module may contain 64MB (2 x 32MB)
or 128MB (4 x 32MB) of memory installed in the
configurations shown in Figure 3. Follow these
instructions to add or replace SIMMs in a single or dualredundant configuration.

Figure 1. HSZ70 Cache Module

Shut down both controllers in the following order with these
commands:
SHUTDOWN OTHER_CONTROLLER
SHUTDOWN THIS_CONTROLLER

When the controllers shut down, their reset buttons and their
first three LEDs are lit continuously.
1

Turn off the power to the subsystem.

Disconnect the ECB cables from both cache modules.

Disable both ECBs by pressing their shut off buttons until
their status lights stop blinking—about 2 seconds.

Disengage the two retaining levers on each cache module
and remove both cache modules.

2
3 2x

1
2
3
4
5

Cache-memory power LED
External cache battery (ECB) cable
Retaining lever
Backplane connector
SIMM

To install the SIMMs...
Figure 2. Inserting a SIMM into Its Slot

VHDCI Cable Precautions
All of the cables to the controller, cache module, and ECB use
very-high density cable interconnect connectors (VHDCI). These
connectors have extraordinarily small mating surfaces that can be
adversely affected by dust and movement. Follow these
precautions when you’re connecting VHDCI cables:

Clean the mating surfaces with a blast of clean air.
Mate the connectors by hand, then tighten the retaining
screws to 1.5 inch-pounds—approximately 1/4 additional
turn after the connectors have fully mated.
Test the assembly by gently pulling on the cable, which
should not produce visible separation.

Dual-Redundant Configurations
To remove the cache module...
1.
2.

From a host console, dismount the storage units in the
subsystem.
Connect a local terminal to one of the controllers in the
subsystem. The controller to which you’re connected is “this
controller.”

Install the SIMMs as shown in Figure 2. Insert each SIMM
into its socket at a 45 degree angle; rock the SIMM gently
until it’s seated in its socket; then tip the SIMM upright until
both retaining clips engage the SIMM.
CAUTION: Both cache modules must contain the same
amount of memory. Populate sockets 1 and 3 for 64MB of
memory, or all of the sockets for 128MB of memory, as
shown in Figure 3.

The DIGITAL logo is a trademark of Digital Equipment Corporation.
Copyright 1997 Digital Equipment Corporation
EK–70SIM–IN. A01

Single Configurations

Figure 3. SIMM Configurations

To remove the cache module...
1.

From a host console, dismount the storage units in the
subsystem.

Connect a local terminal to the controller.

Shut down the controller with the following command:
SHUTDOWN THIS_CONTROLLER

1 2

4 3

64 MB configuration

1 2

When the controller shuts down, its reset button and the first
three LEDs are lit continuously.

4 3

128 MB configuration

Turn off the power to the subsystem.

Disconnect the ECB cable from the cache module.

Disable the ECB by pressing its shut off button until the
status light stops blinking—about 2 seconds.

Disengage the two retaining levers and remove the cache
module.

To re-install the cache modules...
1.

Insert each cache module into its slot and engage its
retaining levers.

Connect the ECB cables to the cache modules by following
the VHDCI cable precautions.

Restore power to the subsystem. The controllers
automatically restart and the ECBs automatically re-enable
themselves to provide backup power to the cache modules.

Mount the storage units on the host.

To install the SIMMs...
Install the SIMMs as shown in Figure 2. Insert each SIMM
into its socket at a 45 degree angle; rock the SIMM gently
until it’s seated in its socket; then tip the SIMM upright until
both retaining clips engage the SIMM.
Populate sockets 1 and 3 for 64MB of memory, or all of the
sockets for 128MB of memory, as shown in Figure 3.
To re-install the cache module...
1.

Insert the cache module into its slot and engage its retaining
levers.

Connect the ECB cable to the cache module by following the
VHDCI cable precautions.

Restore power to the subsystem. The controller
automatically restarts and the ECB automatically re-enables
itself to provide backup power to the cache module.

Mount the storage units on the host.