On 08/11/2019 12:19, RobH wrote:
> On 08/11/2019 11:24, RobH wrote:
>> 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.
>
> After I was under the impression ubuntu-mate would work with the pi 4, I
> have found out that it doesn't, only for pi 1,2 3 and 3b etc.
>
> I do have a Pi 3 here but it is use as a security monitor with a
> day/night camera.
>
> Thanks anyway.

On the Ubuntu-MATE RPi page:
Ubuntu MATE 18.04.2 is available for Raspberry Pi Model B 2, 3 and 3+
with separate images for armhf (ARMv7 32-bit) and arm64 (ARMv8 64-bit).
We have done what we can to optimise the builds for the Raspberry Pi
without sacrificing the full desktop environment Ubuntu MATE provides on PC.

No mention of Pi4. Pi4 does have different hardware. A special version
of Raspbian was developed to work on Pi4 - kernel 4.19.


--

Chris Elvidge, England

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