The boot process from a USB-stick as described above is simplified. See: https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/README.md
Follow these steps: 1. Format a SD-card with fat32. 2. Write file bootcode.bin to the SD-card. 3. Write with program balenaEther the zip file of Raspbian Buster (aka Raspberry Pi OS (32-bit)) to the USB-stick. 4. To enable ssh, write an empty file with name 'ssh' to the root of the USB-stick. 5. Put both SD-card and USB-stick in the Raspberry PI 2 B (or PI B) slots. Power up the RPi 2B Done! On Saturday, 4 April 2020 09:56:48 UTC-3, Luc Heijst wrote: > > I used to change the root=PARTUUID= setting in cmdline.txt of the (micro) > sd-card of RPI 1B and 2B models to the PARTUUID of the USB-disk. > Then the RPI will run with root on the SDA parttion. > > When raspbian buster (or the latest version of stretch) is written with > balenaEtcher, both sd-card and usb-disk get the same PARTUUID. See below. > > blkid > /dev/mmcblk0p1: LABEL_FATBOOT="boot" LABEL="boot" UUID="4BBD-D3E7" > TYPE="vfat" PARTUUID="738a4d67-01" > /dev/mmcblk0p2: LABEL="rootfs" UUID="45e99191-771b-4e12-a526-0779148892cb" > TYPE="ext4" PARTUUID="738a4d67-02" > /dev/sda1: LABEL_FATBOOT="boot" LABEL="boot" UUID="4BBD-D3E7" TYPE="vfat" > PARTUUID="738a4d67-01" > /dev/sda2: LABEL="rootfs" UUID="45e99191-771b-4e12-a526-0779148892cb" > TYPE="ext4" PARTUUID="738a4d67-02" > /dev/mmcblk0: PTUUID="738a4d67" PTTYPE="dos" > > With the set-ptuuid script downloaded from: > https://www.raspberrypi.org/forums/viewtopic.php?t=253562 we can change > the PARTUUID of the USB-disk (or the sd-card). > The script also changes the PARTUUID settings in cmdline.txt and other > files. > > Example > ===== > Boot from the sd-card with the usb-disk connected > > Now change the PTUUID of the USB-disk > ./set-ptuuid /dev/sda random > Set PTUUID on /dev/sda to e4f3c2c9 (y/n)? > PTUUID on /dev/sda is set to e4f3c2c9 > > blkid > /dev/mmcblk0p1: LABEL_FATBOOT="boot" LABEL="boot" UUID="4BBD-D3E7" > TYPE="vfat" PARTUUID="738a4d67-01" > /dev/mmcblk0p2: LABEL="rootfs" UUID="45e99191-771b-4e12-a526-0779148892cb" > TYPE="ext4" PARTUUID="738a4d67-02" > /dev/sda1: LABEL_FATBOOT="boot" LABEL="boot" UUID="4BBD-D3E7" TYPE="vfat" > PARTUUID="e4f3c2c9-01" > /dev/sda2: LABEL="rootfs" UUID="45e99191-771b-4e12-a526-0779148892cb" > TYPE="ext4" PARTUUID="e4f3c2c9-02" > /dev/mmcblk0: PTUUID="738a4d67" PTTYPE="dos" > > cat cmdline.txt > console=serial0,115200 console=tty1 root=PARTUUID=e4f3c2c9-02 > rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet > init=/usr/lib/raspi-config/init_resize.sh > > Now reboot the RPI with the sd-card and USB-disk still connected > The RPI will now have it's root set to /dev/sda2 > > cat /etcfstab > proc /proc proc defaults 0 0 > PARTUUID=e4f3c2c9-01 /boot vfat defaults 0 2 > PARTUUID=e4f3c2c9-02 / ext4 defaults,noatime 0 1 > # a swapfile is not a swap partition, no line here > # use dphys-swapfile swap[on|off] for that > ===== > > Luc > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/9271e240-75bf-4e13-9150-50c9f443030a%40googlegroups.com.
