ma...@germteig.com: > I am running the Dec 22 9legacy on a machine, and now want to create a > bootable USB on it. > The USB is for a raspberry pi 4 4GB, acting as a standalone auth only.
When you say "bootable USB", do you want to boot the pi4 without an SD card, and just a USB drive? If you're happy to have both SD card and USB drive, you can use the SD card to hold a DOS partition (with bootable kernel and cmdline.txt) and a fsconfig partition (to hold a partition configuration for a /dev/fs device (see fs(3)) which maps the USB drive. This is what I do to set up a pi4 file server with fossil on a SSD drive. My pi4 kernel config doesn't have partfs, fdisk and prep in the bootdir section, and does have fs in the dev section. The cmdline.txt is readparts=1 nvram=#S/sdM0/nvram fsconfig=#S/sdM0/fscfg bootargs=local!/dev/sdXX/fossil and the fscfg partition on the SD card looks like this (the fsdev: first line seems to be undocumented) fsdev: part sdXX/nvram /dev/sdU0.0/data 2096640 512 part sdXX/fossil /dev/sdU0.0/data 2097152 8192000000 part sdXX/swap /dev/sdU0.0/data 8194097152 2048000000 ... plus some other partitions for venti, etc I use the fs(3) device because I haven't been able to get partfs(8) to work at boot time. I think there may be a bug in /sys/src/9/boot where an extra re-mount is missed out. If you want to boot the pi4 completely from a USB drive, with no SD card present (I've never tried this), you'll need an alternative place for a fs(3) configuration (maybe in the built-in bootdir in the kernel?), or the boot code will need tweaking to get the partfs(8) partitions re-mounted at the right time. ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/T4cb044b1eee98e3e-Mc9962f736d0b6ee6e0c0ad7b Delivery options: https://9fans.topicbox.com/groups/9fans/subscription
