Hi :) when trying to backup a "large" Linux near to the limit that can be burned to a DVD-R or DVD+R the internet leaves many questions unanswered.
It's essential to keep permissions for owner and group and the dates. I guess only tar complies to this requirement, but I didn't do research about this issue. I noticed that a .tar.bz2 isn't much smaller than a .tar.gz, but it could be a help when near to the limit of a DVD. First creating a .tar.bz2 and then compressing the .tar.bz2 by 7z, resp. lzma2 will save some bytes. The unanswered questions concern to the limit of a DVD and overburning a DVD. I did research about this. There are three ways of calculating the maximal space for storage media, decimal, the binary prefix, but also a third one. "1 MB" = 1 000 000 B = 10^6 B = 1000 kB "1 MB" = 1 048 576 B = 2^20 B = 1 MiB "1 MB" = 1 024 000 B = 1000 * 1024 B = 1024 kB = 1000 KiB To avoid confusion I'm referring to B only. A DVD is able to store 4 700 000 000 B. There still is the question how much bytes are usable for data, assumed that Rock Ridge, resp. UDF is wanted, resp. needed for a data DVD. Referring to the features of k3b there might be the need to use growisofs by the command line to enable overburn. Will the dry-run option fail, when overburn is enabled? Is there any GUI able to handle this? Do you have some information about the limit of data that can be stored on a DVD-R and DVD+R for files larger than "4GB"? Is it better to create archives smaller than "4GB"? I guess splitting a single archive isn't useful and there seems to be not many applications or scripts able to do this, but it would be no big deal to archive the folders right from start to a number of archives. Do you know what's the usual range for overburning a DVD? Information how to get the smallest possible archive also is wanted. For today I guess I'll create 2 archives and burn them to 2 DVDs, but it's a pity to do this, so for the future I would like to know more about handling this. Cheers! Ralf _______________________________________________ 64studio-users mailing list [email protected] http://lists.64studio.com/mailman/listinfo/64studio-users
