Srx210 Services Gateway Boot Devices And Dual-Root Partitioning Scheme; Boot Devices; Dual-Root Partitioning Scheme - Juniper SRX210 Series Manual

Related
Documentation

SRX210 Services Gateway Boot Devices and Dual-Root Partitioning Scheme

Boot Devices

Dual-Root Partitioning Scheme

Copyright © 2012, Juniper Networks, Inc.
NOTE: We strongly recommend that only transceivers provided by Juniper
Networks be used on an SRX210 Services Gateway. We cannot guarantee
that the interface module will operate correctly if third-party transceivers
are used. Contact Juniper Networks for the correct transceiver part number
for your device.
SRX210 Services Gateway Specifications on page 7
SRX210 Services Gateway Front Panel and Back Panel Views (Low Memory, High
Memory, and PoE Versions) on page 9
SRX210 Services Gateway LEDs on page 11
SRX210 Services Gateway Boot Devices and Dual-Root Partitioning Scheme on page 17
SRX210 Services Gateway Cooling System on page 18
SRX210 Services Gateway Power Supply on page 19
This topic includes the following sections:
Boot Devices on page 17
Dual-Root Partitioning Scheme on page 17
The SRX210 Services Gateway can boot from two devices:
Internal NAND flash (default; always present)
USB storage key (alternate)
The dual-root partitions allow the SRX210 Services Gateways to remain functional if
there is file system corruption and facilitate easy recovery of the corrupted file system.
The dual-root partitioning scheme keeps the primary and backup Junos OS images in
two independently bootable root partitions. If the primary root partition becomes
corrupted, the system will be able to boot from the backup Junos OS image located in
the other root partition and remain fully functional.
When the SRX210 Services Gateway powers up, it tries to boot the Junos OS from the
default storage media. If the device fails to boot from the default storage media, it tries
to boot from the alternate storage media. With the dual-root partitioning scheme, the
SRX210 Services Gateway first tries to boot the Junos OS from the primary root partition
and then from the backup root partition on the default storage media. If both primary
and backup root partitions of a media fail to boot, then the device tries to boot from the
Chapter 2: Hardware Components and Specifications
17