I am rapidly running out of blank CD's and I have run out of patience. I have been trying to burn an iso image of the Vigyaan bio/chemical software workbench and is designed to be a bootable iso image based on Knoppix v3.7 (www.vigyaancd.org/index.html). I now that it works because I have the earlier version on a bootable CD. I have tried both K3b and the gnome CD/DVD Creator. The both have written the iso numerous times, but when I attempt to boot the machine (which is set to boot from the CD as the first boot device. I also recently upgraded SuSE .0 to 9.3 booting form CD's with no problems) the boot process says Booting form CD and the goes on to grub and the normal linux boot. Finally, out of desperation, and a web search, I ran cdrecord for the command line. Here is the dialog: computation@abnormal:/data3/DownLoad/Vigyaan> cdrecord -v dev=0,0,0 speed=40 driveropts=burnfree -dao -eject VigyaanCD-v1.0-beta.iso Cdrecord-Clone 2.01 (i686-suse-linux) Copyright (C) 1995-2004 J�g Schilling Note: This version is an unofficial (modified) version Note: and therefore may have bugs that are not present in the original. Note: Please send bug reports or support requests to http://www.suse.de/feedback Note: The author of cdrecord should not be bothered with problems in this version. TOC Type: 1 = CD-ROM cdrecord: Operation not permitted. WARNING: Cannot set RR-scheduler cdrecord: Permission denied. WARNING: Cannot set priority using setpriority(). cdrecord: WARNING: This causes a high risk for buffer underruns. cdrecord: Warning: not running as root user, fs= option ignored. scsidev: '0,0,0' scsibus: 0 target: 0 lun: 0 Linux sg driver version: 3.5.27 Using libscg version 'schily-0.8'. cdrecord: Warning: using inofficial libscg transport code version (okir@suse.de-scsi-linux-sg.c-1.83-resmgr-patch '@(#)scsi-linux-sg.c 1.83 04/05/20 Copyright 1997 J. Schilling'). Driveropts: 'burnfree' SCSI buffer size: 64512 atapi: 1 Device type : Removable CD-ROM Version : 0 Response Format: 1 Vendor_info : 'ATAPI ' Identifikation : 'CD-RW 52X24 ' Revision : 'K.GC' Device seems to be: Generic mmc CD-RW. Current: 0x0009 Profile: 0x000A Profile: 0x0009 (current) Profile: 0x0008 Profile: 0x0002 (current) Using generic SCSI-3/mmc CD-R/CD-RW driver (mmc_cdr). Driver flags : MMC-3 SWABAUDIO BURNFREE FORCESPEED Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R16 RAW/R96P RAW/R96R Drive buf size : 1961344 = 1915 KB FIFO size : 4194304 = 4096 KB Track 01: data 637 MB Total size: 732 MB (72:33.41) = 326506 sectors Lout start: 732 MB (72:35/31) = 326506 sectors Current Secsize: 2048 ATIP info from disk: Indicated writing power: 5 Is not unrestricted Is not erasable Disk sub type: Medium Type A, high Beta category (A+) (3) ATIP start of lead in: -11634 (97:26/66) ATIP start of lead out: 359846 (79:59/71) Disk type: Short strategy type (Phthalocyanine or similar) Manuf. index: 3 Manufacturer: CMC Magnetics Corporation Blocks total: 359846 Blocks current: 359846 Blocks remaining: 33340 Forcespeed is OFF. Starting to write CD/DVD at speed 40 in real SAO mode for single session. Last chance to quit, starting real write 0 seconds. Operation starts. Waiting for reader process to fill input buffer ... input buffer ready. BURN-Free is OFF. Turning BURN-Free on Performing OPC... Sending CUE sheet... cdrecord: WARNING: Drive returns wrong startsec (0) using -150 Writing pregap for track 1 at -150 Starting new track at sector: 0 Track 01: 637 of 637 MB written (fifo 100%) [buf 100%] 41.6x. Track 01: Total bytes read/written: 668684288/668684288 (326506 sectors). Writing time: 146.185s Average write speed 30.6x. Min drive buffer fill was 29% Fixating... Fixating time: 7.482s BURN-Free was never needed. cdrecord: fifo had 10533 puts and 10533 gets. cdrecord: fifo was 0 times empty and 5154 times full, min fill was 85%. computation@abnormal:/data3/DownLoad/Vigyaan> Absoultely, no errors (at least none that I recognized) and all of the files are on the CD, but it still won't boot from the CD. What am I failing to do? Any help will be most appreciated. Thanks in advance. -- Stephen P. Molnar, Ph.D. Life is a fuzzy set Foundation for Chemistry Stochastic and multivariant http://www.geocities.com/FoundationForChemistry