Re: Creating ISO images in a CDRWless laptop

From: duncan brown (duncanbrown_at_linuxadvocate.net)
Date: 05/14/04

  • Next message: Benjamin J. Weiss: "Re: single linux box on dsl?" 
    Date: Fri, 14 May 2004 10:37:26 -0400 (EDT)
To: <fedora-list@redhat.com>

    David Colomer said:
    > Fist of all my apologies for my lack of knowledge, but I am planning to
    > move my laptop from FC1 to FC2. I have a large amount of information
    > that I want to put into CDs before to move to FC2.

    for posterity, i'm going to paste in the cdrecording faq/howto i've been
    working on into this email. hopefully it'll help it get some
    distribution.

    there's still more work i want to do on it, but here you go:

    everything you've ever wanted to know about cd burning but were afraid to ask

    in this article, i'm going to breeze through many cd burning methods and ways
    to interact with disc images.

    ------------------------------------------------------------------------------

    creating a basic iso disc image from local files

    one of the things you have to ensure before creating an iso for burning is
    that you're not exceeding the 650/700MB limit of your media.

    let's say that what you want to burn is in the directory ./files and we want
    to check the size.

      # du -sh ./files

    now, we want to create our iso image, microsoft requires joliet (-J)
    information
    on the disc to properly render the long filenames, and rock ridge (-R) for
    long
    filenames under linux/unix.

      # mkisofs -RJ -o image.iso ./files

    extremely easy. no muss, no fuss.

    ------------------------------------------------------------------------------

    creating an iso disc image from a cd-rom

    let's assume that your cd drive with the cd-rom is located at /dev/cdrom and
    it is NOT mounted.

    now, we want to use dd to make an exact copy of the disc to an .iso file.
    please note that this does not work if the disc you're working with is a
    multi-session disc (audio and data).

      # dd if=/dev/cdrom of=image.iso

    again, extremely easy. no muss, no fuss.

    ------------------------------------------------------------------------------

    burning an iso image to a blank cd

    first, we need to find out what scsi id your cd writer is. linux uses a scsi
    emulation layer for all ide cd burners, usb key drives and firewire.

      # cdrecord -scanbus

    there will be a line with your cd burner pretty clearly labeled. the first
    bit (with 3 numbers seperated by commas) is what you're looking for. let's
    assume that it reported that your cd burner is located at 0,0,0

      # cdrecord -v speed=40 dev=0,0,0 image.iso

    let's think about what we just read:

    -v is telling cdrecord to give us moderately verbose output, otherwise we'll
    be clueless about the progress of the burn until it is completed.

    speed=40 is telling the cd burner to burn at 40x, you can temper this to the
    speed of your cd burner. it's best not to get too nuts with this number on a
    machine with a limited amount of ram (256 megs or less) and a slower
    processor
    (around 400mhz). if you're one of the unfortunate, keep it down to 4-8x.

    the dev=0,0,0 is the scsi id we were returned with -scanbus

    and, of course, image.iso is the image we're trying to burn.

    ------------------------------------------------------------------------------

    checking the validity of the iso you just downloaded

    typically, an .iso file will come with a file containing md5sums of the
    image,
    this is typically called MD5SUMS or something similar.

    to get the md5sum of an image, use this command

    md5sum image.iso

    now, md5sum also has a -c option to check md5sums against a file, but many
    distributions sign the md5sum file with gpg/pgp, so you'll need to edit out
    that information first and just leave the lines containing the md5sum and the
    file.

    an md5sum line looks like this:

    a6330a9a07c592d15d291929d142e64f image.iso

    now, check the isos against the md5sum file

      # md5sum -c MD5SUMS

    md5sum will go through each file in the MD5SUMS file and check the signature
    of each, reporting an OK for each file that passes the test.

    ------------------------------------------------------------------------------

    blanking a cd-rw disc

    as before, use the following command to find out your cd-rw drive's scsi id

      # cdrecord -scanbus

    now we take scsi id that was returned (let's say 0,0,0) and we want to blank
    this disc quickly (who has time to putz around?)

      # cdrecord blank=fast dev=0,0,0

    now, let's pretend that it didn't work. let's try a little harder.

      # cdrecord blank=all dev=0,0,0

    ok, let's pretend it's being really ill tempered. let's try one last tactic
    before throwing away the disc and adding to the waste dumps.

      # cdrecord blank=all -force dev=0,0,0

    ------------------------------------------------------------------------------

    copying from one disc to another

    first, we'll place our source disc in our /dev/cdrom drive

    now, we've used the following command

      # cdrecord -scanbus

    and found our scsi id (let's say it's 0,0,0). let's copy that disc with the
    following command.

      # cdrecord -v dev=0,0,0 -isosize /dev/cdrom

    let's take a look at we just did

    -v is for verbose output

    dev=0,0,0 tells cdrecord to use the device at scsi address 0,0,0

    -isosize tells cdrecord use the limits of iso discs and specifications while
    burning this file (something that mkisofs already takes care of)

    ------------------------------------------------------------------------------

    copying an audio cd

    here we'll introduce a new command, cdparanoia. this program will rip the
    contents of your audio cd to your hard-drive in several formats and is one of
    the tools used in my own cd2ogg cd ripping and encoding script.

    first, create a temporary directory to store our .wav files

      # mkdir ./audio_temp
      # cd audio_temp

    now we'll run this command

      # cdparanoia -d /dev/cdrom -w 1-

    what'd we just type?

    -d /dev/cdrom tells cdparanoia to use /dev/cdrom, you can specify any drive
    with an audio cd in it.

    -w tells cdparanoia to create .wav audio files

    1- instructs the program to rip from track 1 and up

    and now for the final step, burning the cd with cdrecord

      # cdrecord -v dev=0,0,0 speed=12 -audio -pad *.wav

    -v is ver verbose

    dev=0,0,0 specifies our cd device

    speed=12 specifies the recording speed we want

    -audio tells cdrecord that we're recording audio tracks not disc images

    -pad tells cdrecord to pad the audio files if necessary to conform to cd
    specs

    ------------------------------------------------------------------------------

    mounting a cd image

    this is relatively easy, and as with everything else in this article, you
    must
    be root to perform the actions. keep in mind that this will be read only and
    you will not be able to make changes to the image.

    first, we have to make a mount point

      # mkdir ./mountpoint

    now, we mount the disc image on ./mountpoint

      # mount -o loop image.iso ./mountpoint

    -o loop tells mount to create a temporary /dev device called /dev/loopX where
    is is one higher than the number of the last created loop device.

    image.iso is our image file

    ./mountpoint is where we're mounting it

    +( duncan brown : duncanbrown@linuxadvocate.net )+
    +( linux "just works" : www.linuxadvocate.net )+

    --------------------------------------------------
    Understatement of the century:
    "Hello everybody out there using minix - I'm doing
    a (free) operating system (just a hobby, won't be
    big and professional like gnu) for 386(486) AT
    clones"
             - Linus Torvalds, August 1991
    -------------------------------------------------- 

    -- 
fedora-list mailing list
fedora-list@redhat.com
To unsubscribe: http://www.redhat.com/mailman/listinfo/fedora-list
  • Next message: Benjamin J. Weiss: "Re: single linux box on dsl?"

    Relevant Pages

    • Re: Creating ISO images in a CDRWless laptop
      ... I will move the iso file to the server and check, ... > to interact with disc images. ... > to get the md5sum of an image, ... use the following command to find out your cd-rw drive's scsi id ...
      (Fedora)
    • Re: Copy a CD with cdrecord and a single burner
      ... ISO on your hard drive, and then use the blank CD to burn the ISO to disc., ... burner and using the command line, say, cdrecord? ...
      (Fedora)
    • Re: DVD Burning Software
      ... thought the built-in CD writing in XP wrote in ISO 9660 format both ... There is ISO 9660 and there are various extensions to that specification. ... The Windows XP CD writing utility writes in Mode 1 + Orange Book. ... The act of closing the disc writes the final table of contents to the ...
      (microsoft.public.windowsxp.hardware)
    • Re: (OT) Playing DVD copy
      ... Burned the ISO file to DVD-R using Roxio Easy Media Creator 9, ... You need to use Disc Copier thats in the EMC package to produce the ...
      (misc.consumers)
    • Re: Playing DVD copy
      ... Burned the ISO file to DVD-R using Roxio Easy Media Creator 9, ... But my Pioneer player doesn't recognize it, ... Did you burn the iso image to the disk using image copy, ... I think I used the "burn image to disc" option. ...
      (rec.video.dvd.players)