Preparing to Replace a Solid-State Disk in a T640 RE-C1800 Routing Engine
To prepare to replace an SSD:
1. Determine whether the host subsystem is functioning as the master or as the backup,
using one of these methods:
•
Check the Host Subsystem LEDs on the craft interface. If the green MASTER LED is
lit, the corresponding host subsystem is functioning as the master.
•
Check the MASTER LED on the control board. If the blue MASTER LED is lit, the host
subsystem is functioning as the master.
•
Issue the show chassis routing-engine command.
user@host> show chassis routing-engine
Routing Engine status:
Slot 0:
Current state Master
...
In this example, the Routing Engine in Slot 0 is designated Master in the Current
state field.
2. If the host subsystem is functioning as the master, switch it to backup. Issue the request
chassis routing-engine master switch command.
3. From the master Routing Engine, power down the backup Routing Engine. Issue the
request system power-off other-routing-engine command.
Removing a Solid-State Disk in a T640 RE-C1800 Routing Engine
The SSD is located in the slot labeled DISK1 on the Routing Engine faceplate.
NOTE: The DISK2 slot is not currently supported.
To remove an SSD from a Routing Engine (see Figure 162 on page 329):
1. Place an electrostatic bag or antistatic mat on a flat, stable surface.
2. Verify that the Online, DISK1, and CF LEDs on the backup Routing Engine faceplate
are off.
3. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
the strap to one of the ESD points on the chassis.
4. Using a Phillips (+) screwdriver, number 2, loosen the captive screws on the corners
of the cover.
Copyright © 2017, Juniper Networks, Inc.328
T640 Core Router Hardware Guide
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