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 Forum index » House Training » Beginners Help ( Start Here)
:idea: Iso boot files on multisession usb saving space.
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rcrsn51


Joined: 05 Sep 2006
Posts: 7745
Location: Stratford, Ontario
PostPosted: Mon 02 Apr 2012, 20:15    Post subject:  
gcmartin wrote:
Let suppose that you have a library of ISO (this generally occurs if you are assisting or testing differing PUPs for distro developers and the community.)

After download, it would be nice if there is a way to simply update the boot manager, pointing to the ISO's location, and boot that ISO without going thru ANY other approaches. The intent is that it would be a time saver and you won't have to burn CDs (assuming you understand and use Live media) Thus, excepting for the normal downloading to a location, almost NOTHING is needed to at least boot and observe the Puppy distro behavior. And, excepting the download space impact, there is NO other impact to the system storage.

This would be possible if you set up your hard drive with GRUB4DOS as the primary bootloader.

However, it would only work with Linux's such as Ubuntu that are designed to boot out of an ISO. Conventional Puppies do not have this ability.
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nooby

Joined: 29 Jun 2008
Posts: 9385
Location: SwedenEurope
PostPosted: Tue 03 Apr 2012, 00:20    Post subject:  
Would Barry or somebody else have to change woof
for Puppy to be able to boot iso?

But did not somebody write about that he booted puppy iso?
Typical of me to not make a book mark to it.
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Burn_IT

Joined: 12 Aug 2006
Posts: 646
Location: Tamworth UK
PostPosted: Tue 03 Apr 2012, 04:59    Post subject:  
Quote:
I take it you mean within the ISO or do you mean on the Booting media as its referenced from GRUB4DOS?




Both.
I fell foul of using Windows to copy the files across, and Windows often displays things in the wrong case, and even sometimes changes lower to upper case.
Windows doesn't care what case the names are in, unlike Linux and other OSs.
So to Windows, dave.cmd is the same as DaVE.CMd or any other case mixture of the same characters.
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nooby

Joined: 29 Jun 2008
Posts: 9385
Location: SwedenEurope
PostPosted: Tue 03 Apr 2012, 07:38    Post subject:  
Burn_IT yes windows behave that way. Now that you remind me ... Smile

But I ahve a friendly criticism to your example.

None of these boot Puppy from iso. All your examples
are the standard way of booting puppy extracting from
the iso the needed files and setting up the menu.lst for grub4dos.

while a real iso boot could look like this on NTFS. Linux Mint 12 LXDE 2012

title LM12 LXDE 2012 frugal iso boot of LM12LXDE
find --set-root --ignore-floppies --ignore-cd /linuxmint-12-lxde-cd-32bit.iso
kernel /LM12LXDE/casper/vmlinuz rw file=/cdrom/preseed/mint.seed boot=casper iso-scan/filename=/linuxmint-12-lxde-cd-32bit.iso ramdisk_size=1048576 root=/dev/ram noeject noprompt --
initrd /LM12LXDE/casper/initrd.lz

But that is a cheat boot. The Devs of LM would not recommend that
kind of booting. Maybe not even Puppy devs would approve of it.

I happen to make it by cheating on a USB boot example where
I took out what most likely does not work on NTFS and by chance
that booted and worked very well. No need for sudo other than at
shutdown from Terminal .
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Burn_IT

Joined: 12 Aug 2006
Posts: 646
Location: Tamworth UK
PostPosted: Tue 03 Apr 2012, 07:51    Post subject:  
But it does boot from other ISO files.
The only difference with Puppy ISO is that you need to remember NOT to save back to it.
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nooby

Joined: 29 Jun 2008
Posts: 9385
Location: SwedenEurope
PostPosted: Tue 03 Apr 2012, 09:42    Post subject:  
rcrsn51 wrote:
to boot out of an ISO. Conventional Puppies do not have this ability.


Burn_IT, if he says so then that is very likely to be a correct take on it.

What you gave example on is to do a regular standard frugal install of Puppy.
To name that iso boot will be misleading as I get it.

Igave example on what rcrsn51 refer to only that my way is a cheat while
he refer to how it is done on ext3 or other linux formatted drives.
I cheat because I use NTFS and that is not always supported for iso boot
and to still have access to the HD partition one boot from.

So we fight over what a word combination should mean in the context.
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Burn_IT

Joined: 12 Aug 2006
Posts: 646
Location: Tamworth UK
PostPosted: Tue 03 Apr 2012, 12:44    Post subject:  
Just to cheat I run the ISOs under a Virtual Machine, which works for me!
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nooby

Joined: 29 Jun 2008
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PostPosted: Tue 03 Apr 2012, 15:02    Post subject:  
I did that some year ago too for to be able to test 75 different linux
without doing full install on HD I only did that install on the virtual disk.

But it is not the same. One can not determine the speed and demanding video.
Always some overhead due to the virtual machine doing it's thing.
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