Re: SSG140 failed during upgrade

There could be two things, you can do:

1: The 6.2.0r9 version(signed by old key) might be corrupted, you can contact JTAC if you need this version for recovery.

2: Try upgrading boot loader and then 6.3.0r21 image files via TFTP nd see if that helps:

http://kb.juniper.net/InfoCenter/index?page=content&id=KB10976&actp=search<-- bootloader upgrade bootloader can be dlownloaded from Juniper website and then try upgrading the device to 6.3.0r21.

If above doesn't solve the issues then you will need to contact JTAC.

Thanks,

Vikas