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Ask questions and share experiences about the SRX Series, vSRX, and cSRX.
  • 1.  SRX650 - booting from 4GB external compactflash

    Posted 09-21-2023 10:33

    Hey folks,

    Running JUNOS 11.4R12, I'm attempting to use a 4GB CompactFlash card in an SRX650, while I recognise the documentation indicates a 2GB should be used, they are proving hard to source locally where I am. 

    Following along the document here Backing Up an Installation Using Snapshots (Junos OS) | Junos OS | Juniper Networks for the SRX650 and booting off USB, enabling external CF in u-boot, the SRX seems to identify there is a CF there but thinks there is no space on it:

    Routing Engine   REV 18   750-xxxx   yyyyy          RE-SRXSME-SRE6
      ad1       0 MB                      

    > request system snapshot media external partition      
    error: external (/dev/ad1) is too small. Size must be atleast 1GB

    Have tried a few variations on formatting the 4GB CF, formatted with 4 & 2GB (FAT) partitions using windows diskpart.

    Has anyone had success in a similar scenario, or have any suggestions on other things to try here?

    Thanks in advance.

  • 2.  RE: SRX650 - booting from 4GB external compactflash

    Posted 09-22-2023 16:07

    Hey Mate,

    The SRX650 is a bit of a difficult one. I'm not sure that the USB works as the documentation only refers to a compact flash card and USB operations do not work. 
    Have you tried the "request system snapshot media usb" command? The 'external' flag may be referring to the original CF cards.


  • 3.  RE: SRX650 - booting from 4GB external compactflash

    Posted 09-24-2023 19:08

    Note that there are two CF  slots on the SRX650 SRE - internal (on the SRE board) and external (the face plate of the SRE).

    The USB does work, I can boot it from a USB as the instructions describe and interrupting the boot, but changing the external flag doesn't seem to help the box register there's a CF in the external slot. In theory I should then be able to do a "request system snapshot media external" which would save to the external CF.