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This topic comprises 2 pages: 1 2
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Author
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Topic: Bootable CD ROM
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Jerry Chase
Phenomenal Film Handler
Posts: 1068
From: Margate, FL, USA
Registered: Nov 2000
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posted 03-19-2001 11:43 PM
Short answer: You can't boot cold from a CD-ROM unless the computer recognizes how to read the drive. Generally, that task is relegated to the OS and driver, making it a circular problem. The driver for the CDROM drive needs to be loaded before the disk in the CDROM can be read. Trying to make a CDROM disk universally bootable is similar to asking the Space shuttle to take off without the booster rockets.
With a floppy drive at $15, why bother? Boot from the floppy, load the driver and go from there. If you want to make it look like it is booting cold, don't put the floppy slot through the front bezel, just stick it inside the case with the bootup floppy installed permanently. If it is a DOS based system, then do a SUBST to flip drive A: and drive B: Just what is it you're trying to do, and why? Running an OS off a CDROM isn't a great idea. Many of the commands are only loaded when needed, and CDROMs give much slower access than hard drives. This could cause programs to pause, have timing problems or falter.
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Tod J. Weitzel
Film Handler
Posts: 18
From: San Jose, CA, USA
Registered: Feb 2001
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posted 03-20-2001 03:07 AM
Try consulting the resources located hereShort answer: under EZCD 4, hit the small arrow next to the NEW button to get a popup menu of all the types you can create. The bottom one is "bootable CD." -Tw? (One of these days there will be a film-oriented topic I will be able to post in intelligently...) ------------------ Resident nerd.
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Jerry Chase
Phenomenal Film Handler
Posts: 1068
From: Margate, FL, USA
Registered: Nov 2000
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posted 03-20-2001 10:54 AM
Paul, I think I am still missing something. A floppy doesn't need a boot sector to be readable, all it needs is a proper fat (file allocation table). Using something like format /s puts the IO.SYS and COMMAND.COM on the floppy. The term "bootable" should ONLY be used to refer to a disk with an OS on it. This may be what you want, but I'm not sure.There should be no reason why you can't get the CDROM to read in DOS using a standard CD drive and MSDEX, although, of course, you won't be able to write to it if your burning software doesn't work in DOS. You WILL have to make sure the disk is in the STANDARD CD data format. My guess is that you are using DirectCD to create disks that can be modified like floppies. These can be read under various Windows machines, but not under DOS or Win 3.11. People confuse DirectCD and CD Creator all the time. http://www.roxio.com/ has the adaptec support faqs. Quoting: "In order to support packet writing, when DirectCD closes a session to the ISO 9660 format, it must use ISO 9660 Interchange Level 3. Unfortunately, DOS and Windows 3.1 can only read ISO 9660 Level 1, so DirectCD discs, even when closed to ISO, cannot be read by these operating systems" If you ARE using EZ CD creator then this should help: "Problem Session Not Closed- It sometimes happens that the data (or audio) is recorded correctly, but the session is not closed. In this case a CD recorder can read the disc, but a normal CD-ROM drive or CD audio player cannot. Solution - In Easy CD Creator, go to Disc | Disc Information and click on the Close Session button." Does this help?
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Jason Burroughs
Jedi Master Film Handler
Posts: 654
From: Allen, TX
Registered: Jun 99
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posted 03-20-2001 12:41 PM
I'm not familiar with Mac's TOO much so I'll stick to what I know...There is not a keyboard command to force a boot from CD, the boot order needs to be set in the BIOS, so that it will check the CD first, normal boot order is A,C (or IDE0) SCSI or IDE-CD the method of changing this order depends on the BIOS. For any drive to be able to boot it needs to not only have a boot sector but the necessary files as well. Formatting a floppy with the /s switch accomplishes this, however it works if you have DOS, Windows 95 or 98. As someone stated before in CD Creator click on the down arrow next to "New" and select Bootable CD it will walk you through it.
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Paul G. Thompson
The Weenie Man
Posts: 4718
From: Mount Vernon WA USA
Registered: Nov 2000
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posted 03-25-2001 01:19 AM
Hi, Sean. We can start our computers from CD's also. MAC has an excellent platform, no doubt about it. Trouble is, some of the specialized programs I have do not fit a MAC. Some of the crap I have to contend with in our on-air computers at the radio station were written to run under MSDOS. Even the update as of last month. Macro-Shaft has some good points, too. It is just like eating feces - millions and millions flies can't be wrong! Making a bootable CD was more of a curiosity than anything else. And, with Tod's help, mission accomplished. Again, thanks, Tod, and the rest of you gents who tried to help me. Your guidance is what did the trick, and I learned something. I hope I can help all of you in a technical matter when your butt falls through a crack. These forums are GREAT!
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