Iso on USB

[Patrick Dupre]

Hello,

Something strange to me: it is said:
Fedora Media Writer destroys all data on the USB stick. If you need a non-destructive write method (to preserve existing data on your USB stick) or support for 'data persistence', you can use the livecd-iso-to-disk utility on Fedora.
Then,
livecd-iso-to-disk Fedora-Workstation-Live-x86_64-30-1.1.iso /dev/sdX
where X
could be (if I am correct) c  (/dev/sdc)
Why this will preserve the USB stick?

I would have understand if it was /dev/sdc1  (or something else).

Doing livecd-iso-to-disk Fedora-Workstation-Live-x86_64-30-1.1.iso /dev/sdc
would preserve my partitions sdc1, sdc2 ?

I am missing something.

Thank.

===========================================================================
 Patrick DUPRÉ                                 | | email: [e-mail]
 Laboratoire interdisciplinaire Carnot de Bourgogne
 9 Avenue Alain Savary, BP 47870, 21078 DIJON Cedex FRANCE
 Tel: [phone]
===========================================================================

[Ed Greshko]

On 05/06/2019 02:06, Patrick Dupre wrote:
> Hello,
>
> Something strange to me: it is said:
> Fedora Media Writer destroys all data on the USB stick. If you need a non-destructive write method (to preserve existing data on your USB stick) or support for 'data persistence', you can use the livecd-iso-to-disk utility on Fedora.
> Then,
> livecd-iso-to-disk Fedora-Workstation-Live-x86_64-30-1.1.iso /dev/sdX
> where X
> could be (if I am correct) c  (/dev/sdc)
> Why this will preserve the USB stick?
>
> I would have understand if it was /dev/sdc1  (or something else).
>
> Doing livecd-iso-to-disk Fedora-Workstation-Live-x86_64-30-1.1.iso /dev/sdc
> would preserve my partitions sdc1, sdc2 ?
>
> I am missing something.

Does "man livecd-iso-to-disk" help you understand what the script does.

[Samuel Sieb]

On 6/4/19 11:06 AM, Patrick Dupre wrote:
> Something strange to me: it is said:
> Fedora Media Writer destroys all data on the USB stick. If you need a non-destructive write method (to preserve existing data on your USB stick) or support for 'data persistence', you can use the livecd-iso-to-disk utility on Fedora.
> Then,
> livecd-iso-to-disk Fedora-Workstation-Live-x86_64-30-1.1.iso /dev/sdX
> where X
> could be (if I am correct) c  (/dev/sdc)
> Why this will preserve the USB stick?
>
> I would have understand if it was /dev/sdc1  (or something else).

Where did you see that message?  The man page suggests using a partition 
(e.g. /dev/sdc1), not the whole disk device.
> Doing livecd-iso-to-disk Fedora-Workstation-Live-x86_64-30-1.1.iso /dev/sdc
> would preserve my partitions sdc1, sdc2 ?

Yes, it will, unless you use the --format option which is usually what I do.

[Tom Horsley]

I use a completely different way to boot from USB. I followed
(mostly) the instructions here (and things it points at) and
have a bootable USB stick which contains several ISO images
and can boot them from grub:

https://wiki.archlinux.org/index.php/Multiboot_USB_drive

[Patrick Dupre]

===========================================================================
 Patrick DUPRÉ                                 | | email: [e-mail]
 Laboratoire interdisciplinaire Carnot de Bourgogne
 9 Avenue Alain Savary, BP 47870, 21078 DIJON Cedex FRANCE
 Tel: [phone]
===========================================================================
> Sent: Tuesday, June 04, 2019 at 9:27 PM
> From: "Samuel Sieb" 
> To: [e-mail]
> Subject: Re: Iso on USB
>
> On 6/4/19 11:06 AM, Patrick Dupre wrote:
> > Something strange to me: it is said:
> > Fedora Media Writer destroys all data on the USB stick. If you need a non-destructive write method (to preserve existing data on your USB stick) or support for 'data persistence', you can use the livecd-iso-to-disk utility on Fedora.
> > Then,
> > livecd-iso-to-disk Fedora-Workstation-Live-x86_64-30-1.1.iso /dev/sdX
> > where X
> > could be (if I am correct) c  (/dev/sdc)
> > Why this will preserve the USB stick?
> >
> > I would have understand if it was /dev/sdc1  (or something else).
>
> Where did you see that message?  The man page suggests using a partition

In my opinion, this is ambiguous:
livecd-iso-to-disk Fedora-Workstation-Live-x86_64-30-1.1.iso /dev/sdX

in https://docs.fedoraproject.org/en-US/quick-docs/creating-and-using-a-live-in...
> (e.g. /dev/sdc1), not the whole disk device.
> > Doing livecd-iso-to-disk Fedora-Workstation-Live-x86_64-30-1.1.iso /dev/sdc
> > would preserve my partitions sdc1, sdc2 ?
>
> Yes, it will, unless you use the --format option which is usually what I do.
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[Samuel Sieb]

On 6/4/19 2:08 PM, Patrick Dupre wrote:
> > Where did you see that message?  The man page suggests using a partition
>
> In my opinion, this is ambiguous:
> livecd-iso-to-disk Fedora-Workstation-Live-x86_64-30-1.1.iso /dev/sdX
>
> in https://docs.fedoraproject.org/en-US/quick-docs/creating-and-using-a-live-in...

I agree.

I also noticed that near the bottom of that page is the answer to your 
other question about qemu.