[syslinux] Changing USB-key geometry from syslinux.exe?

H. Peter Anvin hpa at zytor.com
Fri Jan 14 18:07:40 PST 2005

H. Peter Anvin wrote:
> Paolo Salvan wrote:
>> I'm playing with syslinux 3.0x to get PC to boot from USB key...
>> In particular, I'm giving a look at the "ZIP geometry hack" to get 
>> some more
>> BIOS boot working with USB...
>> Some question:
>> - if we have a usbkey with a single partition, can we change the geometry
>> without requiring to reformat the partition? Or is a reformat 
>> unavoidable?
> You can do it by poking the FAT header (and probably the partition 
> table, although SYSLINUX and the SYSLINUX MBR ignores the CHS 
> information in the partition table.)

Oh yes, if someone wants to implement this it should be two fields in 
the boot sector header which needs to be poked.  Would probably be 
faster than wait for me to get a round tuit...


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