you can take snapshot using " root> request system snapshot media usb partition". Plugin the USB and run this command, once its completed you can use this USB to bootup another SRX.
Or the other option is to create a bootable USB drive using the install-media package that can be downloaded from our download site http://www.juniper.net/support/downloads/?p=srx3600#docs
You can prepare the bootable image using any one method given below.
https://kb.juniper.net/KB27369
https://kb.juniper.net/KB19576
Or the other option is to create a bootable USB drive using the install-media package that can be downloaded from our download site http://www.juniper.net/support/downloads/?p=srx3600#docs
You can prepare the bootable image using any one method given below.
https://kb.juniper.net/KB27369
https://kb.juniper.net/KB19576