GNU bug report logs - #34487
dd (coreutils) 8.30 – A written ISO image cannot not be booted from BIOS

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Ricky Tigg <ricky.tigg <at> gmail.com>
To: bug-coreutils <at> gnu.org
Subject: dd (coreutils) 8.30 – A written ISO image cannot not be booted from BIOS
Date: Fri, 15 Feb 2019 13:02:24 +0100

[Message part 1 (text/plain, inline)]

Hi. An ISO image cannot not be booted from BIOS

Initial device state:
# parted /dev/sdc unit s print free
Model: (...) (scsi)
Disk /dev/sdc: 15638480s
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:

Number Start End       Size        Type   File system   Flags
       2s    15638479s 15638478s          Free Space

Then commands executed were (Note: a non-live ISO image is involved):

# dd if=debian-9.7.0-amd64-DVD-3.iso of=/dev/sdc bs=4M oflag=direct && sync
$ df -hT | tail -n1
/dev/sdc    iso9660   4.4G  4.4G     0 100% /run/media/yk/Debian 9.7.0
amd64 3
# parted /dev/sdc unit s print free
Error: /dev/sdc: unrecognised disk label
Model: (...) (scsi)
Disk /dev/sdc: 15638480s
Sector size (logical/physical): 512B/512B
Partition Table: unknown
Disk Flags:

That dd command was also executed without option/parameter 'oflag=direct'.
but final result remained identical. I could notice that *dd* erased
existent *partition table* and didn't add flag *boot.* Once at last the
system was rebooted, then proper device selected from BIOS , the following
message was produced:

> *Reboot and select proper boot device or insert boot media in selected
> boot device and press a key.*
>

[Message part 2 (text/html, inline)]

Message #8 received at 34487 <at> debbugs.gnu.org (full text, mbox):

From: Assaf Gordon <assafgordon <at> gmail.com>
To: Ricky Tigg <ricky.tigg <at> gmail.com>, 34487 <at> debbugs.gnu.org
Subject: Re: bug#34487: dd (coreutils) 8.30 – A written ISO image cannot not be booted from BIOS
Date: Fri, 15 Feb 2019 07:52:22 -0700

tags 34487 notabug
close 34487
stop

Hello,


On 2019-02-15 5:02 a.m., Ricky Tigg wrote:
> Hi. An ISO image cannot not be booted from BIOS
> 
[...]
> # dd if=debian-9.7.0-amd64-DVD-3.iso of=/dev/sdc 

A CD/DVD image is not the same as a hard drive.
The internal structure differs,
and one can not be copied to the other and expected to work.

Since this is not a bug in dd, I'm closing this item.


For general help regarding operating system installation,
please contact the relevant operating system's mailing list.
In this case, likely Debian-user mailing list:
  https://lists.debian.org/debian-user/
See also https://wiki.debian.org/DebianMailingLists .

regards,
 -assaf

Message #15 received at 34487 <at> debbugs.gnu.org (full text, mbox):

From: Ricky Tigg <ricky.tigg <at> gmail.com>
To: 34487 <at> debbugs.gnu.org
Date: Fri, 15 Feb 2019 19:11:51 +0100

[Message part 1 (text/plain, inline)]

That's was just a *live image* that was required, The equivalent of the
present CD/DVD's ISO was then *debian-live-9.7.0-amd64-gnome.iso*.

[Message part 2 (text/html, inline)]

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