Dell PowerConnect J-SRX210 Hardware Guide - Page 38

J-SRX210 Services Gateway Boot Devices and Dual-Root Partitioning Scheme, Boot Devices

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PowerConnect J-SRX210 Services Gateway Hardware Guide J-SRX210 Services Gateway Boot Devices and Dual-Root Partitioning Scheme Boot Devices This topic includes the following sections: • Boot Devices on page 22 • Dual-Root Partitioning Scheme on page 22 The J-SRX210 Services Gateway can boot from two devices: • Internal NAND flash (default; always present) • USB storage key (alternate) Dual-Root Partitioning Scheme The dual-root partitions allow the J-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 Software 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 Software image located in the other root partition and remain fully functional. When the J-SRX210 Services Gateway powers up, it tries to boot the JUNOS Software 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 J-SRX210 Services Gateway first tries to boot the JUNOS Software 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 J-SRX210 Services Gateway remains fully functional even if it boots the JUNOS Software from the backup root partition of storage media. Related Topics • J-SRX210 Services Gateway Specifications on page 7 • J-SRX210 Services Gateway Front Panel and Back Panel Views on page 9 • J-SRX210 Services Gateway with Integrated Convergence Services Front Panel and Back Panel Views on page 12 • J-SRX210 Services Gateway Power Supply on page 24 J-SRX210 Services Gateway Cooling System The cooling system for the J-SRX210 Services Gateway with low memory, high memory, or PoE includes one fixed fan. The J-SRX210 Services Gateway with Integrated Convergence Services has two fixed fans. 22

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J-SRX210 Services Gateway Boot Devices and Dual-Root Partitioning Scheme
This topic includes the following sections:
•
Boot Devices on page 22
•
Dual-Root Partitioning Scheme on page 22
Boot Devices
The J-SRX210 Services Gateway can boot from two devices:
•
Internal NAND flash (default; always present)
•
USB storage key (alternate)
Dual-Root Partitioning Scheme
The dual-root partitions allow the J-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 Software 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 Software image
located in the other root partition and remain fully functional.
When the J-SRX210 Services Gateway powers up, it tries to boot the JUNOS Software
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 J-SRX210 Services Gateway first tries to boot the JUNOS Software 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 J-SRX210 Services Gateway
remains fully functional even if it boots the JUNOS Software from the backup root partition
of storage media.
Related Topics
J-SRX210 Services Gateway Specifications on page 7
•
•
J-SRX210 Services Gateway Front Panel and Back Panel Views on page 9
•
J-SRX210 Services Gateway with Integrated Convergence Services Front Panel and
Back Panel Views on page 12
•
J-SRX210 Services Gateway Power Supply on page 24
J-SRX210 Services Gateway Cooling System
The cooling system for the J-SRX210 Services Gateway with low memory, high memory,
or PoE includes one fixed fan. The J-SRX210 Services Gateway with Integrated
Convergence Services has two fixed fans.
22
PowerConnect J-SRX210 Services Gateway Hardware Guide