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Thread: cannot boot off iso image

  1. #1
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    cannot boot off iso image

    I'm running Windows XP SP1 on Dell C600
    I downloaded Knoppix 3.7 to the root level of C:\ drive
    I renamed the iso to knoppix.iso
    I inserted and booted off the knoppix cd I burned
    at the Boot prompt I entered: bootfrom=/dev/hda1/knoppix.iso
    also tried bootfrom=/dev/hda1
    Knoppix errors and tells me it cannot find the kernel image.

    Now the cheat notes say I should use:
    bootfrom=/dev/hda1/KNX.iso
    but I didn't name the iso file KNX.iso

    What am I doing wrong here?

  2. #2
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    What kind of a File System do you use on the partition where ya have hosted the image (iso)?
    If it is NTFS. ain't gonna boot from it
    That's what I thing maybe I'm wrrong!

  3. #3
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    I don't have 3.7 so may be way off here but does Knoppix support booting from the iso or do you have to do a 'tohd' install?

  4. #4
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    Supposely bootfrom allows booting off unsupported(fully) Filesystems.

    I've never gotten it to work though.

  5. #5
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    Quote Originally Posted by sealview
    What kind of a File System do you use on the partition where ya have hosted the image (iso)?
    If it is NTFS. ain't gonna boot from it
    That's what I thing maybe I'm wrrong!
    Ok here's what I don't understand. Knoppix will mount the ntfs hard drive read only. I remember reading somewhere that linux can't write to an NTFS partition but can read from it.

    What I don't understand is if it can read from NTFS shouldn't it be able to boot from it? I mean wouldn't booting just involve a read action? Would booting from the iso require writing of any temp files to the hda1?

  6. #6
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    Quote Originally Posted by uber
    <snip>

    What I don't understand is if it can read from NTFS shouldn't it be able to boot from it? I mean wouldn't booting just involve a read action? Would booting from the iso require writing of any temp files to the hda1?
    I'm with you, uber. When Knoppix boots from the CD it doesn't write anything to the hard drive, and so it should be when booting from an .iso file on the hard drive. Having said that, I haven't been able to boot Knoppix from the .iso file on my hard drive either, but the Knoppix .iso is not in the "C" partition, and also I haven't renamed it.

    Also, perhaps the ability to access NTFS partition is not in the basic stuff loaded into RAM during boot? In other words, maybe it's a chicken-or-egg problem: you have to load the whole Linux kernel into RAM in order to access an NTFS partition. Unfortunately I don't know. Sorry.

  7. #7
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    Re: cannot boot off iso image

    Quote Originally Posted by uber
    I'm running Windows XP SP1 on Dell C600
    I downloaded Knoppix 3.7 to the root level of C:\ drive
    I renamed the iso to knoppix.iso
    I inserted and booted off the knoppix cd I burned
    at the Boot prompt I entered: bootfrom=/dev/hda1/knoppix.iso
    also tried bootfrom=/dev/hda1
    Knoppix errors and tells me it cannot find the kernel image.

    Now the cheat notes say I should use:
    bootfrom=/dev/hda1/KNX.iso
    but I didn't name the iso file KNX.iso

    What am I doing wrong here?
    you should have sp2 :O

    why not just boot from cd and save your configuration to floppy?

  8. #8
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    Re: cannot boot off iso image

    What am I doing wrong here?
    you should have sp2 :O

    LOL
    eeeewwww

    why not just boot from cd and save your configuration to floppy?[/quote]

    actually the problem I'm trying to work around is that my employer is too cheap to provide me with a Linux laptop to run what I need to run. I thought Knoppix was the way out. The winders laptop I was issued only has 512 meg of ram. I just wanted a bit more speed out of it.

  9. #9
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    Booting from .iso file on hard drive

    One reason I can think of for wanting to boot from the hard drive is to free up the CD drive. (I presume that the Knoppix CD can be removed from the drive once control has been transferred to the .iso image.)

    Another reason is that applications in Knoppix wouldn't take so long to load into RAM.

  10. #10
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    I have booted Knoppix 3.7 off my hard drive on a Windows XP SP1 laptop and a Windows NT4 desktop, both of which use NTFS. Therefore it can be done!

    My NT4 option is nearest to what you are trying to do. However you do not use the ISO, but the Knoppix file you find in the \KNOPPIX directory when you burn the ISO to a CD.

    When you burn the CD you will find a file simply called KNOPPIX in the directory \KNOPPIX of the CD.

    Using Windows create a directory c:\KNOPPIX on your hard drive and copy the file from your CD to it.

    Now when you boot up from the (burnt) CD you type:
    knoppix26 bootfrom=/dev/hda1

    add any other cheatcodes you might want AFTER the bootfrom cheatcode. The command above uses the 2.6 kernel. The 2.4 kernel never worked on NT4 with Knoppix 3.4 so I have not tried with later versions!
    N.B. The capitalisation of the names is important.

    If you really want to use the ISO you have to do what I have done on my laptop. This is a Poor Mans Install (PMI) for NTFS, which was developed by minds greater than myself after a long and tortuous struggle. However, it was well worth it because the result is brilliant!

    Have a look here:
    http://www.knoppix.net/wiki/Poor_Mans_Install

    This gives you some introductory notes on the process. Follow the link to method 2 Win Partition to see what to do.

    You are going to have to download Ruymbeke's files (9MB if I remember rightly) but once things are set up you will love being able to boot you PC into Knoppix without the need of the cd-rom.

    Hope that helps.

    ICPUG

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