Re: SAVSYS to IMGCLG then to DVD on PC

HA! Yeah I thought that at some point myself, special hidden files or some bootloader magic in a particular track in sector 0.

The secret seems to be this block of files:

QFILEBT
QFILELDS
QFILEMCD
QFILESCR
QIAMXXX

Where QIAMXXX is QIAM400 if you create the disk with LICPGM option 40 or look at old version of the O/S.

Clearly if you use a standard burner or Jim's or My favorite program those files will all be on the disk, that's not the issue. I believe the issue is that at the time the disk is written certain parts of the directory or other important things are not always done in a way that the Power System firmware recognizes that there is anything at all on the disk.

What I can tell you is that when it's going to fail, it's going to fail FAST. You get like one blink on the DVD drive and done. It's as if the disk is seen as completely empty or perhaps just blank. When it's going to work you see multiple blinking fits and after 30 or so seconds it goes on steady as these files are loaded to memory.

Popping the disk into a machine that is up and running and you CAN see the files. I suspect there is less 'intelligence' in the firmware so it spends less time interrogating the disk. With the O/S up and running it either works harder or has code that recognizes a disk that's not 'perfectly' burned.

- Larry "DrFranken" Bolhuis

www.frankeni.com
www.iDevCloud.com
www.iInTheCloud.com

On 8/5/2013 8:48 AM, rob@xxxxxxxxx wrote:

What makes a DVD bootable for IBM i? Is it the presence of certain files
or are there certain hidden files like in the old days of diskettes for
PC's?


Rob Berendt