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Old 10-28-2004, 04:44 AM   #1
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Splitting an ISO image

How can i split an ISO image?How can i combine them?
I want to burn some systemfiles or i want to take backup of linux into cd's
if the size of the total files is more than size that a cd can then i want to split that ISO image.How to split this ISO image.again when i restoring the files from cd's how can i recombine the files?
Old 10-28-2004, 05:15 AM   #2
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you can use split or dd.
i've used this many times to split tar backups into files.
tar clfvpz - . |split --bytes 650m - /1/hda$p.tgz-

to recombine them, use what you wish. with cat, you could cat file1 file2 file3 > whole.file

with dd to split the files, you could use skip.
dd if=bigfile of=file1 count=650 bs=1M
dd if=bigfile skip=650 of=file2 count=650 bs=1M
dd if=bigfile skip=1300 of=file3 count=650 bs=1M
and so on
recombine with cat or whatever you wish.

edit: sorry i copied that first command from a script without really looking at it first. i fixed it. you can change the tar part to a cat and the file you wish to split up for what you want to do.

Last edited by whansard; 10-28-2004 at 05:28 AM.
Old 10-28-2004, 05:21 AM   #3
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This may take forever but using rar to break up the hd image into smaller pieces and adding redunancy with par or par2 may better in case part of a cd gets scratched.
Old 10-28-2004, 05:30 AM   #4
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i don't need to take total backup of harddisk.whatever the files or directories that i want to take backu i will just select them in gui program.after that all the paths that are needed to take backup will be added to one file backup.txt after that i will make an iso image with all the files in backup.txt .In this if size is more than 650 mb it should split it and then burn the first that


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