Raspberry PI 4 Backup Appliance update

An update for the Raspberry PI 4 backup appliance (last post). Raspberry PI specific changes:

  • Upgrade Linux kernel to 5.4.y. This allows e.g. a swap file on the system disk
  • Removed the USB 3.0 UAS driver, since it doesn’t seem to work (with the disks I tested it with — see also this thread). This makes USB disks slower, but at least it works reliably
  • Use xchacha12+adiantum as system disk encryption method since RPI4 doesn’t have AES CPU instructions. This significantly increases performance

    If you want to use it manually outside the appliance use
    cryptsetup luksFormat --cipher xchacha12,aes-adiantum-plain64 --type luks2 --sector-size 4096
    to format the encrypted disk

Download the image for the SD card.

Write the image to the SD card using e.g. Win32 Disk Imager.

Discussion

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