Re: tools/boot/woody/boot-i386 : jigdo images too large !
On Wed, May 08, 2002 at 10:15:37AM +0100, Philip Hands wrote:
>On Tue, 2002-05-07 at 19:35, Jim Westveer wrote:
>
>> We should make sure that our Official images are less
>> than 650 mb !!! The i386 CD #1 jigdo images from
>> cdimage.d.o are 663+mb .
>
>
>phil@open:/home/jigdo-area$ for i in 3.*/jigdo/i386/*1_NONUS.template ;
>do echo $i ; jigdo-file ls --template $i | tail -1 ; done
>3.0-pre2/jigdo/i386/woody-i386-1_NONUS.template
>image-info 679313408 WYUizqGeR2dDNLR1fmGuCQ 4096
>3.0-pre3/jigdo/i386/woody-i386-1_NONUS.template
>image-info 681082880 QG7haK6xa-gFHB6OMNyFyg 4096
>3.0-pre4/jigdo/i386/woody-i386-1_NONUS.template
>image-info 680132608 ZfIQoaBwC9sLqQHmGeYvIw 4096
>
>So the biggest of the recent i386 1_NONUS CDs is 681082880.
>
>Now perhaps I'm wrong, but I was under the impression that a CD was:
>
> 650 * 1024 ^ 2 = 681574400
>
>You appear to be saying that a MB = 1000 * 1024:
>
> 650 * 1024 * 1000 = 665600000
>
>I'm pretty certain I've been managing to get more than that onto 650MB
>CDs for years, but maybe I've just had weird CD writers.
>
>Anyone know the definitive answer here?
CDs actually tend to vary slightly from manufacturer to
manufacturer. What I expect is 74 minutes:
74*60*75*2048 = 681984000
(i.e. 74 minutes * 60 seconds/minute * 75 frames/second * 2048
bytes/frame(sector)).
but when I'm creating CDs I will tweak and retry if any CD is >=
680000000 bytes.
--
Steve McIntyre, Plasmon smcintyre@software.plasmon.com
Getting a SCSI chain working is perfectly simple if you remember that there
must be exactly three terminations: one on one end of the cable, one on the
far end, and the goat, terminated over the SCSI chain with a silver-handled
knife whilst burning *black* candles. --- Anthony DeBoer
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