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Re: [PLUG] Linux Bootable CD
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On Sat, 23 Mar 2002, Bill Jonas wrote:
> On Sat, Mar 23, 2002 at 01:39:46AM -0500, Doug Crompton wrote:
> > No what I meant was why make an ISO file of 650megs when you only need a
> > few megs for a boot CD. Thus the bs and count in dd. mkisfs also only
> > makes a iso the size needed for the data you specify.
>
> I don't really follow you here. A CD with twenty megs of data will
> yield a twenty-meg ISO image, whether via dd, cp, or cat. You're not
> going to end up with a 650M ISO starting with a CD-ROM with 20M of data
> on it.
>
> --
> Bill Jonas * bill@billjonas.com * http://www.billjonas.com/
>
I guess I misunderstood. I thought that someone had said that dd from a
device would copy the entire device image without regard to what was on
the device. I stand corrected.
So dd works from a directory like cat or cp? If the medium were fragmented
it would not copy blank space? Sounds like a good way to defrag!
Doug
****************************
* Doug Crompton *
* Richboro, PA 18954 *
* 215-431-6307 *
* *
* doug@crompton.com *
* wa3dsp@wa3dsp.ampr.org *
* http://www.crompton.com *
****************************
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