Re: bootable CD-ROM image to memstick image?

On Sun, 29 Jun 2014, Warren Block wrote:
> On Sun, 29 Jun 2014, Ian Smith wrote:
>
>> I have a bootable BIOS/EC update CD image for a Lenovo X200, with no CD.
>> 
>> It contains the same good ol' DOS 6.0 BIOS update program as ever, after
>> a loader from not so good ol' Nero Burning ROM, after 64KB of zeroes.
>> 
>> root@x200:~smithi/biosupdate # file 6duj48us.iso
>> 6duj48us.iso: # ISO 9660 CD-ROM filesystem data '6DUJ48US
>> ' (bootable)
>> root@x200:~smithi/biosupdate # mdconfig -f 6duj48us.iso
>> md0
>> root@x200:~smithi/biosupdate # mount_cd9660 /dev/md0 /mnt
>> root@x200:~smithi/biosupdate # ls -a /mnt
>> .       ..
>> root@x200:~smithi/biosupdate #
>> 
>> Is there a generic way to convert this into a bootable USB image?
>
> Possibly the update program and data is in the El Torito floppy image. I've 
> converted floppy images to boot CDs, but not the other way.  This might help: 
> http://arstechnica.com/civis/viewtopic.php?f=16&t=308491

And based on that:

   % isoinfo -d -i 6duj48us.iso
   Setting input-charset to 'ISO8859-1' from locale.
   CD-ROM is in ISO 9660 format
   System id:
   Volume id: 6DUJ48US
   Volume set id:
   Publisher id:
   Data preparer id:
   Application id: NERO BURNING ROM
   Copyright File id:
   Abstract File id:
   Bibliographic File id:
   Volume set size is: 1
   Volume set sequence number is: 1
   Logical block size is: 2048
   Volume size is: 19126
   El Torito VD version 1 found, boot catalog is in sector 20

   Joliet with UCS level 3 found.
   No SUSP/Rock Ridge present
   Eltorito validation header:
       Hid 1
       Arch 0 (x86)
       ID 'NERO BURNING ROM'
       Cksum 8A FC OK
       Key 55 AA
       Eltorito defaultboot header:
           Bootid 88 (bootable)
           Boot media 4 (Hard Disk Emulation)
           Load segment 7C0
           Sys type 6
           Nsect 1
           Bootoff 1B 27

   % dd if=6duj48us.iso of=zoot.img bs=2048 skip=27 count=75744
   19126+0 records in
   19126+0 records out
   39170048 bytes transferred in 0.063829 secs (613672181 bytes/sec)

That file is a 37M MBR hard drive image.  Copying it straight to a 
memory stick ought to work.
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