[EdLUG] Startup Disk Creator not filing .iso files

Thu Oct 1 18:53:33 UTC 2015

Hi Tai,

Thanks for this info.  We have solved the no-write problem of the homeless
shelter simply using the temporary guest session.  But your email is very
helpful.

Googling, I noticed that some people have appended an additional argument
(if that is the correct term) to the end of the command, and not sure what
it means:

use the command dd if=FILE NAME HERE.iso of=/dev/sdX bs=1MB

What does the "bs=1MB" do?  I am guessing that bs means boot sector, and it
specifies 1 mb for the boot sector.  Is that correct?  I notice that your
version of the command leaves off that argument (if that is the correct
term).  What are the pros and cons of leaving it off versus adding it?

Thanks again.

On Thu, Oct 1, 2015 at 2:39 AM, Edinburgh Linux Users Group <
edlug at lists.edlug.org.uk> wrote:

> I think I came across this a couple years ago - the answer, alas, is to
> not use SDC, but the command line.
>
> cd path/to/iso/dir
> lsblk
> # (identify the flash drive - likely /dev/sdb or /dev/sdc or the likes)
> # (you should be able to identify it by its size - or just remove the
> flash drive, run lsblk again, see what disappears)
> sudo dd if=name_of_image.iso of=/dev/sdc # (as appropriate)
>
> This will copy byte-for-byte the ISO to your flash drive, overwriting it
> completely. It will look like nothing is happening when you run the
> command, but that's just the 'dd' command - it's not verbose at all. Takes
> about 1-4 minutes depending on ISO side and write speed of the flash drive.
>
> Note that if this is one of the official Ubuntu respins (Ubuntu, Lubuntu,
> Kubuntu, etc) then it should be fine to boot from flash disk. Other ISOs
> may not have compatibility for being written to and booted from a flash
> disk.
>
> You can convert an ISO to "hybrid" (CD and USB compatibility) by
> installing the syslinux utility and running isohybrid (which will modify
> the ISO file itself - maybe do this on a copy of the ISO)
>
> sudo apt install syslinux
> isohybrid path/to/your.iso
>
> Good luck
>
>
>
> ===
> Tai Kedzierski
>
> Affordable Office IT for Freelance and Startup Businesses
> http://helpuse.com/
>
>   I use www.libreoffice.org
>
> *"Open Source Free Software is a matter of liberty, not price."*
> http://bit.ly/foss-why-care
>
>
> On 1 October 2015 at 01:08, Edinburgh Linux Users Group <
> edlug at lists.edlug.org.uk> wrote:
>
>> Hi,
>>
>> Sorry I hit send too early by accident.
>>
>> I am trying to create a live CD on a flash drive using Startup Disk
>> Creator (SDC) in Ubuntu 14.04.  I am running into a known problem that does
>> not seem to have a solution.  Namely, SDC does not load the selected .iso
>> to load to the flash drive.  Here is a page where the problem is mentioned,
>> with no solution:
>>
>>
>> http://askubuntu.com/questions/459931/startup-disk-creater-not-loading-iso-file-in-14-04
>>
>> Any ideas?  I have tried all of the solutions mentioned there, including
>> moving the selected iso to its own dir.  No luck.  SDC still doesn't load
>> the iso.
>>
>> I have also tried unetbootin.  Unetbootin is able to see and load the
>> iso, but then the flash drive fails.  I have tried it on two separate flash
>> drives and it failed both times.  I did a md5sum check and got this, which
>> i think is a pass
>>
>>
>> ragingwaters at H8PL44D1:~$ cd /home/ragingwaters/Distros/
>> ragingwaters at H8PL44D1:~/Distros$ md5sum sanickiosk-v2.5.iso
>> 2b8ab335f66750ac01f4769e5b3bbb56  sanickiosk-v2.5.iso
>> ragingwaters at H8PL44D1:~/Distros$
>>
>> Thanks!
>>
>> On Wed, Sep 30, 2015 at 5:07 PM, Christian Einfeldt <einfeldt at gmail.com>
>> wrote:
>>
>>> Hi,
>>>
>>> I am trying to create a live CD on a flash drive using Startup Disk
>>> Creator (SDC) in Ubuntu 14.04.  I am running into a known problem that does
>>> not seem to have a solution.  Namely, SDC does not load the selected .iso
>>> to load to the flash drive.  Here is a page where the problem is mentioned,
>>> with no solution:
>>>
>>>
>>> http://askubuntu.com/questions/459931/startup-disk-creater-not-loading-iso-file-in-14-04
>>>
>>> Any ideas?  I have tried all of the solutions mentioned there, including
>>> moving the selected iso to its own dir.  No luck.  SDC still doesn't load
>>> the iso.
>>>
>>> I have also tried unetbootin.  Unetbootin is able to see and load the
>>> iso, but then the flash drive fails.  I have tried it on two separate flash
>>> drives and it failed both times.  I did a md5sum check and got this, which
>>> i think is a pass
>>>
>>>
>>>
>>> --
>>> Christian Einfeldt
>>>
>>
>>
>>
>> --
>> Christian Einfeldt
>>
>> _______________________________________________
>> EdLUG mailing list
>> EdLUG at lists.edlug.org.uk
>> https://lists.edlug.org.uk/mailman/listinfo/edlug
>>
>>
>
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>

-- 
Christian Einfeldt
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