[EdLUG] Startup Disk Creator not filing .iso files

Thu Oct 1 20:49:48 UTC 2015

bs = block size.  E.g default is 512k by setting it higher it writes quicker

Kris
On 1 Oct 2015 19:53, "Edinburgh Linux Users Group" <edlug at lists.edlug.org.uk>
wrote:

> 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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