Appendix D - Recovering From A Failed Upgrade - Secure Computing SG300 User Manual

Appendix D – Recovering From a
Failed Upgrade
Note
Please read this appendix before requesting an RMA from customer support.
If the Heart beat (or H/B) LED is not flashing 20 – 30 seconds after power is supplied, the
SnapGear unit is unable to boot correctly. This is usually because the firmware inside
the SnapGear unit has been written incorrectly or incompletely, or in rare cases it may
have become corrupted.
In this situation, a recovery boot reprograms the SG to bring it back to a usable state.
This can be done using Netflash (netflash.exe) if you are running Windows, otherwise
you have to set up a BOOTP (DHCP) server.
Both procedures are outlined below.
Note
netflash.exe is located in the \tools directory on the SG CD, or it can be obtained from SG
customer support.
Recovery using Netflash
Note
To recover your SnapGear unit using netflash.exe, two additional files are required.
These are the recovery image (.sgr) and final firmware image (.sgu) appropriate for your
unit. They are available in the \images directory of the SG CD that shipped with your
unit, or from SG customer support.
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Appendix D – Recovering From a Failed Upgrade