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   RBERRYPI      Support for the Raspberry Pi device      21,939 messages   

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   Message 19,041 of 21,939   
   Theo to Bryan   
   Re: Getting a CM4 to boot from USB?   
   07 Jan 24 17:23:02   
   
   INTL 3:770/1 3:770/3   
   REPLYADDR theom+news@chiark.greenend.org.uk   
   REPLYTO 3:770/3.0 UUCP   
   MSGID:  6eb921a2   
   REPLY:  902777b0   
   PID: SoupGate-Win32 v1.05   
   Bryan  wrote:   
   > I downloaded the image, unzipped it, and SCP'd it over to the Pi. I then   
   > used these instructions to flash the Pi, and it booted with no external   
   > devices. Yay!   
   >   
   > For now, I'm going to use this as-is, as I need the 4G modem to replace   
   > some old 2G stuff that's offline in a few months here in the USA.   
   > Otherwise, I will probably look to purchase a real Lite version at some   
   > point in the future and pass this board on to someone who would like,   
   > but can't afford one.   
      
   Glad you got it sorted.  One thing you can do, at the expense of a slightly   
   non-standard setup, is to keep your /boot partition on the eMMC, and set   
   config.txt to use a root partition on your USB.  So most of your OS   
   lives on the USB and only the kernel, firmware and device trees live on the   
   eMMC.  That means you aren't limited by the eMMC size for your OS install.   
      
   To do this you flash the OS to your USB as well as the eMMC, then boot the   
   Pi from eMMC and alter:   
      
   root=/dev/mmcblk0p2   
      
   to   
      
   root=/dev/sda2   
      
   in config.txt.  You'll also need to amend /etc/fstab on the USB to match.   
      
   Theo   
      
   --- SoupGate-Win32 v1.05   
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