jeans/home-assistant.io
jeans/home-assistant.io
1
0
Fork 0
mirror of https://github.com/home-assistant/home-assistant.io.git synced 2025-07-23 01:06:52 +00:00
Code Issues Packages Projects Releases Wiki Activity

Update usb_boot.markdown (#20120)

Browse Source
This commit is contained in:
Ashton Lafferty 2021-11-02 10:19:01 -06:00 committed by GitHub
parent d0701980a4
commit 32502aa2d9
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
source/_faq/usb_boot.markdown
View File

@ -3,6 +3,7 @@ title: "Is USB Boot for the Raspberry Pi 4 supported?"
ha_category: Home Assistant
---
Due to the complexity of USB and the USB mass storage device class booting from a USB device is brittle. Since booting from a USB drive this process has to be done multiple times (firmware/boot loader and the operating system), there is a high chance that this process doesn't complete in one of these stages. In general, the Linux USB stack is solid. Due to this, it is recommended to boot Home Assistant OS from an SD card and use a USB attached flash drive as data partition only. The `datactl` command, available on the OS shell, allows moving of the data partition.
Due to the complexity of USB and the USB mass storage device class, booting from a USB device is brittle. When booting from a USB drive this process has to be done multiple times (firmware/boot loader and the operating system), and there is a high chance that this process doesn't complete during one of these stages. In general, the Linux USB stack is solid, so it is recommended to boot Home Assistant OS from an SD card and use a USB attached flash drive as data partition only. The data move can be accomplished through the `datactl` command on the host or through the UI. For more information, see [Using external Data Disk](/common-tasks/os/#using-external-data-disk)
That said, booting Home Assistant OS completely from a USB drive (SSD or any other USB mass storage device) works with *some* USB devices. USB Devices that are known to work with Raspberry Pi OS (check the Raspberry Pi Forum) are more likely to work with Home Assistant OS. However, because Home Assistant OS has also U-Boot in the boot chain, there are devices which are known to work with Raspberry Pi OS but do *not* work with Home Assistant OS.
That said, booting Home Assistant OS completely from a USB drive (SSD or any other USB mass storage device) works with *some* USB devices. USB Devices that are known to work with Raspberry Pi OS (check the Raspberry Pi Forum) are more likely to work with Home Assistant OS. However, because Home Assistant OS has also U-Boot in the boot chain, there are devices which are known to work with Raspberry Pi OS but do *not* work with Home Assistant OS.