• Monitoring the SRX100 Services Gateway Power System on page 101
• SRX100 Services Gateway Electrical and Power Requirements on page 30
SRX100 Services Gateway Boot Devices and Dual-Root Partitioning Scheme
This topic includes the following sections:
•
Boot Devices on page 11
•
Dual-Root Partitioning Scheme on page 11
Boot Devices
The SRX100 Services Gateway can boot from the following storage media (in the order
of priority):
•
Internal NAND Flash (default; always present)
•
USB storage key (alternate)
Dual-Root Partitioning Scheme
Dual-root partitions allow the SRX100 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 SRX100 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
SRX100 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
next available type of storage media. The SRX100 Services Gateway remains fully
functional even if it boots the Junos OS from the backup root partition of storage media.
NOTE: SRX Series devices that ship from the factory with Junos OS Release
10.0 are formatted with the dual-root partitioning scheme.
The SRX100 Services Gateways that are running Junos OS Release 9.6 or earlier use the
single-root partitioning scheme. While upgrading these devices to Junos OS Release 10.0,
you can choose to format the storage media with dual-root partitions (strongly
recommended) or retain the existing single-root partitioning.
For instructions on upgrading to Junos OS Release 10.0, see the following topics:
•
Initial Configuration for Security Devices
11Copyright © 2015, Juniper Networks, Inc.
Chapter 2: Hardware Component Overview
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