SG105rev1 flashed to XG105 memory limit

Hello,

I've a SG105 rev 1 which has been flashed to XG a several years ago.

I've replaced the internal 2GB memory by a 4GB PC3-12800 memory to increase total memory and pray to be able to upgrade from firmware SFOS 17.5.14 MR-14-1 to v18.

But after memory upgrade, the XG see only around 3 GB of RAM. Why ? it's not an 32 bits unsigned integer limit (4GB) not a signed integer limit (2GB).

Is this a volontary limitation to force to buy a new device ? #NotEcological. I'm alone in the desk, no need to replace my router.

Thanks,

Vincent

  • Hi Vincent,

    are you using the home version or Sophos hardware version?

    Ian

     
    V18.0.x - e3-1225v5 6gb ram on 4 port MB with 2 x APX120 - 20w. 
    If a post solves your question use the 'This helped me' link.
  • Hello

    Since the XG105 is not supported with V18 firmware, due to the physical memory status, I would assume that an SG105 converted to Sophos XG firmware would present as an XG105, and the firmware upgrade would fail based on model identification.

    Regardless of you upgrading the memory in the device.

    Regards

    Gavin

    Regards,

    Gavin Daniels. DipIT(Networking)

     

     
  • Hi Gavin,

    from previous discussions people have been upgrading them to 4gb and installing home XG, but maybe that model is using a 32bit processor?

    Isn

     
    V18.0.x - e3-1225v5 6gb ram on 4 port MB with 2 x APX120 - 20w. 
    If a post solves your question use the 'This helped me' link.
  • I have searched for hardware details on a rev 1 and not found any only comments about it not being memory upgradeable.

    ian

     
    V18.0.x - e3-1225v5 6gb ram on 4 port MB with 2 x APX120 - 20w. 
    If a post solves your question use the 'This helped me' link.
  • Hi,

    maybe the XG105 is not upgradeable but the SG105 converted to XG105 is. I'm in the last case with the hardware version of SG105.

    I'm using a RED & a wireless AP.

    I have to check if the SG105 is a 32 or 64 bits processor. If it's a 32 bits processor, it won't be possible to use more that 4MB of RAM so it won't be possible de use the v18 firmware.

    But for both 32 & 64 architecture, I don't understand the 3 GB memory limite.