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Groups > comp.os.linux.misc > #91606

Re: ISO9660 images, vfat USB mass storage devices and El Torito

From "Carlos E.R." <robin_listas@es.invalid>
Newsgroups comp.os.linux.misc
Subject Re: ISO9660 images, vfat USB mass storage devices and El Torito
Date 2026-09-17 08:22 +0200
Organization Tebibyte_Retro_Gaming
Message-ID <fhdsnmx95q.ln2@Telcontar.valinor> (permalink)
References (4 earlier) <ngtkq4F9b65U3@mid.individual.net> <118cmjs$2t1q9$12@dont-email.me> <ngu6i2F83ghU11@mid.individual.net> <118el6h$3jnoh$2@dont-email.me> <_4OdnQ3HEs1x0jb3nZ2dnZfqn_qdnZ2d@giganews.com>

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On 2026-09-17 04:25, c186282 wrote:
> On 9/16/26 13:55, Nuno Silva wrote:
>> On 2026-09-16, rbowman wrote:
>>
>>> On Wed, 16 Sep 2026 01:07:24 +0100, The Natural Philosopher wrote:
>>>
>>>> On 15/09/2026 20:32, Carlos E. R. wrote:
>>>>> On 2026-09-15 19:21, rbowman wrote:
>>>>>> On Tue, 15 Sep 2026 16:38:03 +0100, The Natural Philosopher wrote:


>>> Try copying an iso greater than 4 GB to a vfat formatted thumb drive.
>>
>> That's only if you want to move it across different systems while inside
>> a FAT* filesystem, but if you want to *boot* it, it won't work unless
>> there's some special arrangement to find the ISO image inside the
>> filesystem and chainload it (is this even easy to do if the image
>> requires random access to the disc to boot? IIRC El Torito had two boot
>> methods, floppy images and... was it hard disk emulation?).
>>
> 
>    Just tried, and verified, the neato-trick presented
>    here :
> 
>    Insert stick, make sure it's mounted, 'lsblk' will give
>    you all you need.

on the contrary, do not mount. It works both ways, but weird errors may 
happen with the mount.

> 
>    Then :
> 
>    "cp MyISOFile.iso /dev/sda" or "sdb" or whichever.
> 
>    Apparently cp then treats the stick as a 'device'
>    rather than a file system. It's kind of the same
>    effect as using 'dd'.

Because you are not copying to the filesystem, that is in the mount point.

Even "echo" can do the trick IIRC; or cat. dd is not the only destroyer 
here.

-- 
Cheers, Carlos.
ES🇪🇸, EU🇪🇺;

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Wow - Oracle Linux - 10+ Gigabyte ISO ! c186282 <c186282@nnada.net> - 2026-09-15 03:52 -0400
  Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Marco Moock <mm@dorfdsl.de> - 2026-09-15 10:54 +0200
    Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-15 23:30 +0000
  Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Woozy Song <suzyw0ng@outlook.com> - 2026-09-15 17:08 +0800
    Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-09-15 16:38 +0100
      Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-15 17:21 +0000
        Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! "Carlos E. R." <robin_listas@es.invalid> - 2026-09-15 21:32 +0200
          Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-09-16 01:07 +0100
            Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-16 00:35 +0000
              Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! "Carlos E. R." <robin_listas@es.invalid> - 2026-09-16 07:13 +0200
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-09-16 11:38 +0100
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! c186282 <c186282@nnada.net> - 2026-09-16 21:26 -0400
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! "Carlos E.R." <robin_listas@es.invalid> - 2026-09-17 08:17 +0200
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-17 06:25 +0000
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! "Carlos E.R." <robin_listas@es.invalid> - 2026-09-17 08:38 +0200
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! c186282 <c186282@nnada.net> - 2026-09-17 03:34 -0400
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! c186282 <c186282@nnada.net> - 2026-09-17 02:41 -0400
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! "Carlos E.R." <robin_listas@es.invalid> - 2026-09-17 09:44 +0200
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-09-17 17:44 +0000
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! "Carlos E.R." <robin_listas@es.invalid> - 2026-09-17 20:38 +0200
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-17 19:39 +0000
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-17 19:35 +0000
                Ventoy for ISO management? (Re: Wow - Oracle Linux - 10+ Gigabyte ISO !) Lars Poulsen <lars@beagle-ears.com> - 2026-09-26 09:23 -0700
                Re: Ventoy for ISO management? (Re: Wow - Oracle Linux - 10+ Gigabyte ISO !) rbowman <bowman@montana.com> - 2026-09-26 19:21 +0000
                Re: Ventoy for ISO management? (Re: Wow - Oracle Linux - 10+ Gigabyte ISO !) jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-09-26 19:21 -0400
                Re: Tips for dd ( was Re: Ventoy for ISO management?) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-27 03:00 +0000
                Re: Tips for dd ( was Re: Ventoy for ISO management?) Eli the Bearded <*@eli.users.panix.com> - 2026-09-27 04:18 +0000
                Re: Tips for dd ( was Re: Ventoy for ISO management?) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-27 07:05 +0000
                Re: Tips for dd ( was Re: Ventoy for ISO management?) Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-27 09:17 +0100
                Re: Tips for dd ( was Re: Ventoy for ISO management?) The Natural Philosopher <tnp@invalid.invalid> - 2026-09-27 12:57 +0100
                Re: Tips for dd ( was Re: Ventoy for ISO management?) "Carlos E.R." <robin_listas@es.invalid> - 2026-09-27 14:23 +0200
                Re: Tips for dd ( was Re: Ventoy for ISO management?) The Natural Philosopher <tnp@invalid.invalid> - 2026-09-27 17:41 +0100
                Re: Tips for dd ( was Re: Ventoy for ISO management?) "Carlos E.R." <robin_listas@es.invalid> - 2026-09-27 19:55 +0200
                Re: Tips for dd ( was Re: Ventoy for ISO management?) "Carlos E.R." <robin_listas@es.invalid> - 2026-09-27 12:53 +0200
                Re: Tips for dd ( was Re: Ventoy for ISO management?) Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-27 18:04 +0100
                Re: Tips for dd ( was Re: Ventoy for ISO management?) c186282 <c186282@nnada.net> - 2026-09-27 04:13 -0400
                Re: Tips for dd ( was Re: Ventoy for ISO management?) "Carlos E.R." <robin_listas@es.invalid> - 2026-09-27 12:53 +0200
                Re: Tips for dd ( was Re: Ventoy for ISO management?) c186282 <c186282@nnada.net> - 2026-09-28 01:37 -0400
                Re: Tips for dd ( was Re: Ventoy for ISO management?) "Carlos E.R." <robin_listas@es.invalid> - 2026-09-28 10:09 +0200
                Re: Tips for dd ( was Re: Ventoy for ISO management?) Philippe <p.naudin+nntp@free.fr> - 2026-09-28 12:10 +0200
                Re: Tips for dd ( was Re: Ventoy for ISO management?) Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-28 23:03 +0000
                Re: Ventoy for ISO management? (Re: Wow - Oracle Linux - 10+ Gigabyte ISO !) "s|b" <me@privacy.invalid> - 2026-09-27 18:56 +0200
                Re: Ventoy for ISO management? (Re: Wow - Oracle Linux - 10+ Gigabyte ISO !) Andy Burns <usenet@andyburns.uk> - 2026-09-27 18:17 +0100
                Re: Ventoy for ISO management? (Re: Wow - Oracle Linux - 10+ Gigabyte ISO !) ant@zimage.comANT (Ant) - 2026-09-28 00:50 +0000
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-17 19:28 +0000
              Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-09-16 11:37 +0100
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-16 18:04 +0000
              ISO9660 images, vfat USB mass storage devices and El Torito (was: Re: Wow - Oracle Linux - 10+ Gigabyte ISO !) Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-16 18:55 +0100
                Re: ISO9660 images, vfat USB mass storage devices and El Torito c186282 <c186282@nnada.net> - 2026-09-16 22:25 -0400
                Re: ISO9660 images, vfat USB mass storage devices and El Torito "Carlos E.R." <robin_listas@es.invalid> - 2026-09-17 08:22 +0200
                Re: ISO9660 images, vfat USB mass storage devices and El Torito c186282 <c186282@nnada.net> - 2026-09-17 03:28 -0400
                Re: ISO9660 images, vfat USB mass storage devices and El Torito "Carlos E.R." <robin_listas@es.invalid> - 2026-09-17 10:32 +0200
                Re: ISO9660 images, vfat USB mass storage devices and El Torito rbowman <bowman@montana.com> - 2026-09-17 20:25 +0000
                Re: ISO9660 images, vfat USB mass storage devices and El Torito c186282 <c186282@nnada.net> - 2026-09-17 21:26 -0400
                Re: ISO9660 images, vfat USB mass storage devices and El Torito "Carlos E.R." <robin_listas@es.invalid> - 2026-09-19 21:39 +0200
                Re: ISO9660 images, vfat USB mass storage devices and El Torito rbowman <bowman@montana.com> - 2026-09-20 01:55 +0000
                Re: ISO9660 images, vfat USB mass storage devices and El Torito "Carlos E.R." <robin_listas@es.invalid> - 2026-09-20 14:10 +0200
                Re: ISO9660 images, vfat USB mass storage devices and El Torito rbowman <bowman@montana.com> - 2026-09-20 17:35 +0000
                Re: ISO9660 images, vfat USB mass storage devices and El Torito "Carlos E.R." <robin_listas@es.invalid> - 2026-09-20 21:01 +0200
                Re: ISO9660 images, vfat USB mass storage devices and El Torito rbowman <bowman@montana.com> - 2026-09-21 02:28 +0000
                Re: ISO9660 images, vfat USB mass storage devices and El Torito "Carlos E.R." <robin_listas@es.invalid> - 2026-09-21 11:36 +0200
                Re: ISO9660 images, vfat USB mass storage devices and El Torito rbowman <bowman@montana.com> - 2026-09-21 19:06 +0000
                Re: ISO9660 images, vfat USB mass storage devices and El Torito "Carlos E.R." <robin_listas@es.invalid> - 2026-09-21 21:48 +0200
          Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-16 00:33 +0000
            Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! "Carlos E. R." <robin_listas@es.invalid> - 2026-09-16 07:14 +0200
              Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-16 05:45 +0000
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! "Carlos E. R." <robin_listas@es.invalid> - 2026-09-16 08:52 +0200
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-16 07:44 +0000
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! "Carlos E. R." <robin_listas@es.invalid> - 2026-09-16 10:07 +0200
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-16 17:53 +0000
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-09-17 14:02 +0100
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-17 19:02 +0000
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-09-17 22:18 +0100
              Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-16 06:18 +0000
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-09-16 11:39 +0100
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-16 17:48 +0000
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! "Carlos E.R." <robin_listas@es.invalid> - 2026-09-16 20:40 +0200
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! c186282 <c186282@nnada.net> - 2026-09-16 21:40 -0400
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! c186282 <c186282@nnada.net> - 2026-09-16 22:18 -0400
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-09-17 03:29 +0000
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! "Carlos E.R." <robin_listas@es.invalid> - 2026-09-17 08:25 +0200
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! c186282 <c186282@nnada.net> - 2026-09-17 02:33 -0400
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-09-17 14:11 +0100
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! "Carlos E.R." <robin_listas@es.invalid> - 2026-09-17 20:40 +0200
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-09-17 14:00 +0100
              Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! c186282 <c186282@nnada.net> - 2026-09-16 21:27 -0400
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-17 02:11 +0000
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-09-17 14:07 +0100
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-17 19:41 +0000
            Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-09-16 11:35 +0100
              Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-16 18:02 +0000
                Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-09-17 14:04 +0100
        Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-09-16 01:05 +0100
  Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Lars Poulsen <lars@beagle-ears.com> - 2026-09-15 05:50 -0700
    Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Philippe <p.naudin+nntp@free.fr> - 2026-09-15 15:23 +0200
      Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Bud Frede <frede@mouse-potato.com> - 2026-10-08 15:52 -0400
        Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Cóilín Nioclásín Glostéir <thanks-to@Taf.com> - 2026-10-10 18:40 +0000
          Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! c186282 <c186282@nnada.net> - 2026-10-11 00:12 -0400
            Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Andy Burns <usenet@andyburns.uk> - 2026-10-11 10:01 +0100
              Monochrome and readability (was: Re: Wow - Oracle Linux - 10+ Gigabyte ISO !) Nuno Silva <nunojsilva@invalid.invalid> - 2026-10-11 10:15 +0100
                Re: Monochrome and readability The Natural Philosopher <tnp@invalid.invalid> - 2026-10-11 10:37 +0100
                Re: Monochrome and readability c186282 <c186282@nnada.net> - 2026-10-12 01:06 -0400
                Re: Monochrome and readability Andy Burns <usenet@andyburns.uk> - 2026-10-12 10:12 +0100
                Re: Monochrome and readability Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-10-12 21:08 +0000
                Re: Monochrome and readability John Ames <commodorejohn@gmail.com> - 2026-10-12 14:50 -0700
                Re: Monochrome and readability Rich <rich@example.invalid> - 2026-10-15 02:51 +0000
                Re: Monochrome and readability c186282 <c186282@nnada.net> - 2026-10-13 00:58 -0400
                Re: Monochrome and readability Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2026-10-12 16:27 +0000
                Re: Monochrome and readability Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-10-12 21:14 +0000
                Re: Monochrome and readability c186282 <c186282@nnada.net> - 2026-10-13 01:37 -0400
                Re: Monochrome and readability "Carlos E.R." <robin_listas@es.invalid> - 2026-10-13 12:50 +0200
              Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-10-11 10:37 +0100
              Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-10-11 21:31 +0000
            Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! The Natural Philosopher <tnp@invalid.invalid> - 2026-10-11 10:31 +0100
    Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Andy Burns <usenet@andyburns.uk> - 2026-09-15 14:40 +0100
    Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-15 17:24 +0000
    Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Lawrence D’Oliveiro <ldo@nz.invalid> - 2026-09-16 01:50 +0000
      Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! Leroy H <lh@somewhere.net> - 2026-09-16 02:31 +0000
      Re: Wow - Oracle Linux - 10+ Gigabyte ISO ! rbowman <bowman@montana.com> - 2026-09-16 06:25 +0000

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