Instead of using my original Hass. This command would allow transferring the installation from one block device to another.Īnd so I pursued that route.
#Why is external hard drive read only raspberry pi how to#
While I struggled to find clear instructions on how to split the boot process (and OS installation) between the MicroSD card and the external USB drive for the older RPi's, I could however find reports of RPi 4 users (because initially boot from USB was not yet ironed out in the software supporting this version of the RPi), seemed that (at least at a first glance) they were having success with the datactl command of the HassOS.
Still I was convinced that there had to be another solution: in a regular computer, we are able to configure a bootloader or some form of boot related routines to start the OS from a different partition or block device. Usually, you think of solid state storage as faster than a rotating hard drive.
In my case however, the RPi I had available was the RPi 2 v1.1 and as such did not have this feature implemented. This flag also enables the ability to network boot in some devices. This is in most part harmless, but the user should take into account that if a USB storage device is present during boot, the RPi will take longer to start because now it will first initialize and search on the USB drive before booting up from the MicroSD card. Once this is done, it cannot be reverted.
That is probably how the myth was established: People bought cheap Pi, then just pick an existing power supply without checking the spec or head up directly to EBAY to get a 2.0A power supply (ebay is like an ocean of fake power supplies, the changes of getting a genuine one are very small). This is normally not enabled from the factory, and the user has to first boot the RPi from a MicroSD card with a flag set in the config.txt file (see ).Īfter the flag is passed (program_usb_boot_mode=1), during boot the RPi will burn the flag into the OTP memory that is built inside the Broadcom SoC. The SAMSUNG power supply is good enough providing 2.0A.
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