reflasher for the boxes

! Note this is very very very very custom and will murder your SD card.

Procedure for re-flashing

• Prepare boot.scr

  • Go to boot/
  • Edit boot.cmd to set the dhcp server IP
  • Run mkimage -T script -A arm -d boot.cmd boot.scr
  • Copy boot.scr to the boot partition of the box, currently /mnt/boot

• Prepare tftp setup

  • Run ./install.sh /path/to/tftproot

• Copy the image

  • Find the sdcard image
  • Copy the image in some way to the SSD drive (/mnt/ssd) on the box
  • The image must be named FLASH.IMG

• Reboot the box

  • The reflash takes ~20 minutes

• Pray

How was this prepared

• Get the latest d-i from https://d-i.debian.org/daily-images/armhf/daily/netboot/
• Unpack initrd.gz
• Install some extra udebs in it (available in udebs/)
  • vfat (if you want to touch the boot partition)
  • ext4 (for the ssd)
  • sata modules (for the ssd)
• Rewrite init to do crap
  • Load modules
  • Wait for the devices to show
  • Mount the ssd
  • dd FLASH.IMG from the ssd to the card
  • sync, sync, sync
  • echo b > /proc/sysrq-trigger
• Rebuild initrd, boot it