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тАО01-18-2001 08:45 AM
тАО01-18-2001 08:45 AM
I'm making an Ignite image of a 1.5Gb vg00 to be eventually stored on a bootable CD.
I've successfully made the make_sys_image which was 500MB in size, built my config files, modified these to point to DSK rather than NET, ran make_medialif, built an HFS file system, ran the dd, then wrapped the LIF file around the image with make_medialif.
My bootable image to copy onto CD is now an incredible 2.1GB in size!!
Have I made an error along the line here somewhere? How can I get around this?
I've read on here about the version of gzip (1.2.4a) that can zip file sizes over 2GB and I installed this before running the make_sys_image but that didn't solve the problem.
Any help appreciated,
Mark
Solved! Go to Solution.
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тАО01-18-2001 09:30 AM
тАО01-18-2001 09:30 AM
Re: Ignite CD Image Too Big
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тАО01-19-2001 03:42 AM
тАО01-19-2001 03:42 AM
Re: Ignite CD Image Too Big
Are your lvol of 2.1 Gb???...
about gzip question, make_sys_image use it by default so your 1,5 GB are reduced to 500Mb, this is all your system image reduced.
Try again with a lvol of 600, or up 740 Mb.
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тАО01-19-2001 04:03 AM
тАО01-19-2001 04:03 AM
Re: Ignite CD Image Too Big
I forced make_sys_image to use the new gzip and the image is 600MB. When this is copied to the new HFS lvol it remains 600MB. I then did a
dd if=/dev/vgxx/rvolx of=/var/tmp/image_hfs bs=1024k
and this plus the lif header wrapper produces the 2.1Gb image.
I've noticed from the make_medialif man pages that the example uses 1024k bs for a 250MB image. Seeing as my original image is double this size do you think a bs of 2048k would possibly solve the problem?
Thanks again
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тАО01-19-2001 05:11 AM
тАО01-19-2001 05:11 AM
Re: Ignite CD Image Too Big
In the first case (dd), what is the size of your hfs lvol ? 2.1 GB ?
The dd command dump the whole lvol, and so create a very large file.
So you have to create a lvol smaller than the maximum size of your CD (remember your image will be larger after adding LIF files).
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тАО01-19-2001 06:28 AM
тАО01-19-2001 06:28 AM
Re: Ignite CD Image Too Big
I've run the whole process again and it's only after the dd that the image becomes over 2GB. The LIF header image is 33MB.
Why is the dd turning a 600MB image into 2GB??
Thanks again,
Mark
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тАО01-19-2001 11:23 AM
тАО01-19-2001 11:23 AM
SolutionHow big is the HFS LVOL that you are copying this too? As has been said before, if the LVOL that you are doing the dd from is set up to be 2 GB the the output of your dd command is going to be 2 GB as well. The dd reads the whole logical volume, including all the empty parts, not just the data. dd doesn't care how much data is there. Changing the block size in the dd command probably won't make any difference.
Your best bet is to create a LVOL that is about 600 MB in size and copy your stuff to that. Then do the dd from that LVOL. That should keep the size down to an amount that will fit on a CD.
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тАО01-20-2001 03:53 PM
тАО01-20-2001 03:53 PM
Re: Ignite CD Image Too Big
from what I read - could it be you have a 600MB file
system in a 2.1GB LVol??? Then you must add something
like "count=600" to your "dd" command line.
HTH,
Wodisch
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тАО01-22-2001 01:09 AM
тАО01-22-2001 01:09 AM
Re: Ignite CD Image Too Big
Carlos, apologies but I did not realise first time that this is what you were saying and so did not assign full points. If I could change the points I would but I don't appear to be able to do so. Thanks for you help, much appreciated.
Mark
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тАО01-22-2001 04:11 AM
тАО01-22-2001 04:11 AM
Re: Ignite CD Image Too Big
Mark: Dont worry.
The best important is your problem is corrected, with help of one or many forumers.
Be happy.