i spent the hole evening with my A1095 to see why the hell it didn´t want to boot from usb.
have been reading about OF to understand better how it works and have tested different media types to see what works and what doesn´t.
Good news is : I have it booting from usb now.
Bad news is : it panics just after a minute or so but more about this later.
Here my thoughts :
- any drive bigger than 8 GB cannot be read.
- some small unbranded usb drives i have ( about 1 GB) were not seen by OF.
- usb cd-rom media is not accesible from OF.
- diskutill displays "media is not bootable" ( even if it is)
- media brand is probably irrelevant.
- partition layout has to be Apple´s partition layout, i´m not sure yet if MBR layout will work.
- same for filesystem, i´m not sure yet what fs are readable from OF but fat and hfs work fine.
My procedure was just to plugin the drives one by one and to check which ones could be seen AND browsed from within OF. For example :
will list the first partition of the hd alias ( probably your first hard drive )
will list the contents of the usb drive ( as detected in my system).
IF you can browse the contents then the usb drive should be bootable. Otherwise OF will apparently hang and you will have to reboot.
I will be testing a few more things and will update again soon.
The reason why i´m not concerned about the kernel panic is because the media i had to use is probably faulty but it is the only one that has 8 GB.
As a side note : OF is actually quite powerful, the only major thing that REALLY pisses me off is the fact that it thinks that EVERYONE uses an english keyboard layout. Imagine how funny it is to use on a keyboard with spanish layout ... and no, this cannot be changed AFAIK.
Now the big question : does anyone know if these roms are upgradeable ?
thanks !