Cant boot iso from flash drive (Solved)

[tosim]

I placed the iso on a flash drive, first using Pentoy, secondly using MultiBoot USB. FossaPup WOULD NOT boot from iso on flash drives; it "could not find the .sfs files". Any help greatly appreciated. Thanks.

[dogFellow]

FossaPup WOULD NOT boot from iso on flash drives

yeah i guess its easier to come to that conclusion as opposed to "the writing software you are using is crap"

[rcrsn51]

FossaPup WOULD NOT boot from iso on flash drives

yeah i guess its easier to come to that conclusion as opposed to "the writing software you are using is crap"

There is nothing wrong with your writing software. It did its job and made a bootable flash drive.

The problem is with FossaPup's inability to find its own .sfs file on USB once the boot process has started.

[tosim]

Thank you both. BTW-I've been using both of those apps since each came out, and I know they write well.

[rcrsn51]

Look at the contents of the flash drive for a file like syslinux.cfg.

If it contains "pmedia=cd", change it to "pmedia=usbflash".

[dogFellow]

Look at the contents of the flash drive for a file like syslinux.cfg.

If it contains "pmedia=cd", change it to "pmedia=usbflash".

yeah like i said the writing software is crap.

have been booting all the manual frugal installed fossapup releases from usb no problem at all


fossapup9.5 booted from usb

[tosim]

Re "Look at the contents of the flash drive for a file like syslinux.cfg."-Nothing like this in either contents, but thanks for the suggestion.

[bigpup]

There has to be one of these files.
syslinux.cfg
grub.cfg
isolinux.cfg
menu.lst

Depending on the boot loader being used.
These files are the ones used by different boot loaders to have the boot menu entries.

If the USB flash drive has more than one partition.
Look on the first one for one of these files.
they could also be in a directory(folder) named boot or something like that.

[tosim]

Thanks for the reply. On the Ventoy flash, I could find none of these files. Please see attachment bp1.On the MultibootUSB flash,please see syslcf attachment

syslcf.png (64.82 KiB) Viewed 4502 times

.

bg1.png (2.77 KiB) Viewed 4502 times

Once again, thank you.

[rcrsn51]

So you are trying to boot directly out of the ISO file without first extracting it into the individual components?

This probably isn't going to work with your booting tools. The main Puppy .sfs file is hiding inside the ISO and Puppy can't find it when the boot process starts.

The old ISObooter tool from here can do this.

Is this a UEFI machine?

Or this may be a timing problem with USB booting on your machine.

[tosim]

Using your link-Internal Server Error. Thanks for your suggestion, anyway.
I've had almost no problems, opening the iso's over the several years I've been "distro-looking". My main drive is Linux Mint-MATE, been using Linux since 1998, and just like to checkout new arrivals. However, I really like the Puppy, and the Dog os', and over several years, have "played around" with many.

[rcrsn51]

Using your link-Internal Server Error.

That link works OK for me. It's in the old forum.

[allendiggity]

Confirming this issue on two laptop systems:

Ancient HP zd8000, Not as ancient Toshiba L750. Both can boot other puppies / EasyOS from USB with no issue, but the current Fossapup 9.5 .iso drops to a grub command line as it cannot find the .sfs file on these systems. Tried with multiple USB media, written from linux with dd.

My fix: I remastered the .iso using mkisofs and isohybrid, changing occurrences of pmedia=cd to pmedia=usbflash.

Once I did that, booting worked as normal.

[sebrio]

I got the same problem on all my PCs. I created my USB from different software (Startup disk creator, ...) and always ended up with pmedia=cd.
The simplest solution for me was to use unetbootin: https://unetbootin.org

[Clarity]

Anyone care to mention a solution for modern PUPS and DOGS that has been working flawlessly for over 18 months? Use the SG2D directions given on the 1st pages of FossaPUP64's announcement thread.

1. You make a USB once!

• Then forevermore, you merely add the PUp-DOG ISOs of your choice to its /BOOTISOS folder on its partition. They will be listed and booted without issues. ... NONE!

Total process for a single USB is 5 minutes to download-make the USB/DVD (this is ONLY done once for the stick or the disc). 15 seconds to copy largest of PUP or DOG ISO to the /BOOTISOS folder.

Rest is a simple: Boot, select, and you have desktop.

Works!

[sebrio]

But that was my point...
When you say "You make a USB once!": I could not. I tried a lot of different ways to do just that, and they failed without feedback. The softwares I used to properly create a bootable USB based on the FossaPup64, were not doing their job, worse they were telling me the job was done properly.
I ended up thinking I had a bios problem, or FossaPup64 was not compatible with my hardware, but it took me some time to realise that my bootable USB was half bootable, and generating some strange errors saying my files were not there, even though I could clearly see them.
Hence I recommend to check on your bootable USB: your config files must not contain pmedia=cd after using whichever software you choose to create it.

[Clarity]

Hi @sebrio

This USB writing problem is an age-old problem that affects us all. It is confused by various things:

• PC's port

• USB sticks

• author's instructions to create media from the source

• OS

• generation software

I know as I have had the same kinds of issues over the past 2 decades of USBs.

If you would like, open a thread and let see if we can get a start-to-finish set of instructions for a USB that will allow you to boot not only FossaPUP64, and also the modern PUPs.

OR post an assistance request here, and the community will aid to a solution allowing you to boot your desired PUP ISO. On my old 64bit PCs (all of my PCs are old), I have never needed to change options "CD to USBFLASH" in booting the PUPs shown above.

Hope this can lead to something simple and useful.

[ThruHammer]

http://www.murga-linux.com/puppy/viewto ... 250#517250