Examine (and fix?) non-booting USB

From	Mike Easter <MikeE@ster.invalid>
Newsgroups	alt.os.linux
Subject	Examine (and fix?) non-booting USB
Date	2019-01-31 09:16 -0800
Message-ID	<gbgos8F9i9qU1@mid.individual.net> (permalink)

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I have two USBs; one which boots to a live partitioned Ub Mate 18.04.1 
made from an .iso with mkusb* (front end for dd), the other which has 
the same UbMate installed to the USB using the Ub Ubiquity installer on 
the live UbMate according to these guidelines**.  The latter does not boot.

How can I see (and paste here) what is wrong with the one which doesn't 
boot with such as fdisk or other?  Should it be possible to retro-create 
a boot part and put a grub there?

The first parts certainly looks different in GPartEd.  The one which 
boots has a fat32 part with a usbboot label and a boot flag.  The one 
which doesn't does not.  I thought the Ubiquity installer was supposed 
to do that if I told it where I wanted the boot manager.  I created the 
parts with GPartEd and the mount point prior to starting the Ubiq installer.

The installed 16G USB does have a 1G fat32 part which I created at the 
front, but it is almost empty and has no boot label nor boot flag.  All 
of the 4.5 G of install is on an ext4 part.

* https://help.ubuntu.com/community/mkusb  mkusb - tool to create boot 
drives
** 2014 Sep: 
http://ubuntuhandbook.org/index.php/2014/11/install-real-ubuntu-os-usb-drive/ 
  How to Install The Real Ubuntu System on USB Flash Drive


-- 
Mike Easter

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Thread

Examine (and fix?) non-booting USB Mike Easter <MikeE@ster.invalid> - 2019-01-31 09:16 -0800
  Re: Examine (and fix?) non-booting USB Mike Easter <MikeE@ster.invalid> - 2019-01-31 09:31 -0800
  Re: Examine (and fix?) non-booting USB "Carlos E.R." <robin_listas@es.invalid> - 2019-01-31 18:52 +0100
    Re: Examine (and fix?) non-booting USB Mike Easter <MikeE@ster.invalid> - 2019-01-31 10:24 -0800
  Re: Examine (and fix?) non-booting USB Dan Purgert <dan@djph.net> - 2019-01-31 18:50 +0000
    Re: Examine (and fix?) non-booting USB Mike Easter <MikeE@ster.invalid> - 2019-01-31 11:19 -0800
      Re: Examine (and fix?) non-booting USB "Carlos E.R." <robin_listas@es.invalid> - 2019-01-31 21:48 +0100
      Re: Examine (and fix?) non-booting USB "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2019-01-31 18:18 -0500
        Re: Examine (and fix?) non-booting USB "Carlos E.R." <robin_listas@es.invalid> - 2019-02-01 02:52 +0100
          Re: Examine (and fix?) non-booting USB "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2019-01-31 21:09 -0500

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