On 08/11/2019 11:03, Chris Elvidge wrote:
> On 08/11/2019 10:29, RobH wrote:
>> On 08/11/2019 09:07, Mark J wrote:
>>> In message 
>>>            Chris Elvidge  wrote:
>>>
>>>> On 07/11/2019 12:52, RobH wrote:
>>>>> I'm having a hard time finding the information I want , so I ask here:
>>>>>
>>>>> Has anyone had success using an external disk with the pi 4, and
>>>>> preferably booting from it.
>>>>>
>>>>> The other option I thought about was to put some other version of
>>>>> Linux
>>>>> on it, ubuntu?, but using etcher in linux doesn't do it, as it's an
>>>>> iso.
>>>>>
>>>>> Thanks
>>>
>>>> Not a Pi4 but I have Pi3+s booting from SD card (holding only the /boot
>>>> partition) and 128/256Gb SSD (mSATA in mSATA to USB3 adapter) as root.
>>>> Quite easy if you follow the instructions.
>>>> I never had much luck booting directly from the USB SSD, hence the
>>>> above
>>>> arrangement.
>>>
>>> - but I, with an SSD and RPi3B+, via a mSATA to USB adapter, simply
>>> 'burnt' the SSD with UbuntuMATE as if it were an SD card, and it all
>>> works
>>> without the card installed. /With/ the card installed, the beast boots
>>> from the card with the SSD still plugged in.
>>>
>>>
>
> As I said above, I've never got this to work. Seems (from some reading)
> some USB devices don't work easily. I gave up and used the SD card to
> boot, USB to run.
>
>>
>> An unrelated question:
>> How did you get Ubuntu mate installed, as In tried and it didn't work.
>> I downloaded the tar.gz file, then extracted the img file and the
>> tried to burn it to an sd card with etcher. Etcher complained that it
>> was not a bootable image. I tried again by clicking on the tar.gz file
>> and Discs came up and said something about doing a restore. I selected
>> the sdcard and clicked restore, but after inserting the sdcard into
>> the pi, it didn't boot up.
>
> Use dd to get the image onto the USB device on a Linux box.
>
> dd if=imagefile of=/dev/sd? bs=4M status=progress
>
> Windows: see here
>
https://www.raspberrypi.org/documentation/installation/installing-images/window
s.md
>
> I haven't tried this!!
> YMMV
>
>

Thanks for that, but although the img appears to be booting, as the
green led is flashing on the pi4, there is no video, aaargh!

What have I missed.

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