Unable to create bootable dvd

[Valeri Galtsev]

On Mon, March 20, 2017 1:19 pm, Ernie Luzar wrote:
> James B. Byrne via freebsd-questions wrote:
>> I have downloaded FreeBSD-11.0-RELEASE-amd64-dvd1.iso.
>>
>> I have verified the sha512 hash:
>> FreeBSD-11.0-RELEASE-amd64-dvd1.iso: OK
>>
>> I have checked that the ISO is bootable:
>> file /var/data/disk_images/FreeBSD/FreeBSD-11.0-RELEASE-amd64-dvd1.iso
>>
>> /var/data/disk_images/FreeBSD/FreeBSD-11.0-RELEASE-amd64-dvd1.iso: ISO
>> 9660 CD-ROM filesystem data '11_0_RELEASE_P1_AMD64_DVD' (bootable)
>>
>> However, no matter what technique I use I cannot obtain a bootable DVD
>> from this image, or any other FreeBSD provided ISO file either.
>>
>> growisofs -speed=1 -dvd-compat -Z
>> /dev/sr0=/var/data/disk_images/FreeBSD/FreeBSD-11.0-RELEASE-amd64-dvd1.iso

My hunch is: option "-dvd-compat" screws things up making it not bootable.
That option is only relevant to creation of video DVD ROMs (main goal of
it is re-arrange the track so that table of contents files are the first
onces along the track - which is necessary in stand alone DVD players).

I do use this command all the time to burn bootable media (FreeBSD,
CentOS, Debian, Ubuntu...) and all of them work well for me. I do not use
"-speed" option, but it shouldn't matter, and using slowest speed as you
specify may help getting best possible quality of burn result. Anyway,
here is command line from my command history:

growisofs -Z /dev/dvd=/data/system-media/debian-8.6.0-amd64-i386-netinst.iso

I hope, this helps.

Valeri

>> fdisk -l /dev/sr0
>> . . . a long long time -
>> fdisk -l /dev/sr0
>> Note: sector size is 2048 (not 512)
>>
>> Disk /dev/sr0: 2930 MB, 2930409472 bytes
>> 255 heads, 63 sectors/track, 89 cylinders
>> Units = cylinders of 16065 * 2048 = 32901120 bytes
>> Sector size (logical/physical): 2048 bytes / 2048 bytes
>> I/O size (minimum/optimal): 2048 bytes / 2048 bytes
>> Disk identifier: 0x00000000
>>
>> Now, to verify the software and dvd drive that I am using for this I
>> created a dvd from a CentOS-6.7 image.  This works fine.
>>
>> fdisk -l /dev/sr0
>> Note: sector size is 2048 (not 512)
>>
>> Disk /dev/sr0: 1991 MB, 1991245824 bytes
>> 64 heads, 32 sectors/track, 474 cylinders
>> Units = cylinders of 2048 * 2048 = 4194304 bytes
>> Sector size (logical/physical): 2048 bytes / 2048 bytes
>> I/O size (minimum/optimal): 2048 bytes / 2048 bytes
>> Disk identifier: 0x75c649ae
>>
>>     Device Boot      Start         End      Blocks   Id  System
>> /dev/sr0p1   *           1        1899     7778304   17  Hidden
>> HPFS/NTFS
>> Partition 1 has different physical/logical endings:
>>      phys=(1023, 63, 32) logical=(1898, 63, 32)
>>
>>
>> SO, what is going on?  What is different about the FreeBSD ISO that
>> prevents it from creating a bootable DVD,
>>
>>
>> I have tried this on A CentOS-8 linus host and a Windows7Pro host and
>> cannot obtain a bootable DVD.  I can create bootable DVD from the
>> CentOS ISO on both.
>>
>>
>
>
> I use this command
> cdrecord -v -eject -sao -overburn FreeBSD-11.0-RELEASE-amd64-disc1.iso
>
> To get this command issue "pkg install cdrtools"
>
> .
>
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++++++++++++++++++++++++++++++++++++++++
Valeri Galtsev
Sr System Administrator
Department of Astronomy and Astrophysics
Kavli Institute for Cosmological Physics
University of Chicago
Phone: 773-702-4247
++++++++++++++++++++++++++++++++++++++++