Gustin Johnson wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Ralf Mardorf wrote: > >> 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. >> > > I would skip the bz2 part. Compressing directly with 7zip will be more > efficient. >
I missed testing if 7z will preserve, resp. store permissions. Does it also store permissions? Argh, I'm an idiot, now I do understand, instead of using "tar czf" or "tar cjf" I simply can create an archive by "tar cf" and then use 7z to compress this archive. :D Thank you, I didn't see the forest for the trees. Btw. I did some tests. As expected making a tar.bz2 from an existing tar.bz2 will increase the archive and not compress it. When I asked because of 4GB I was mistaken, I was thinking of 2GB ... will it be better to keep files under the need to use UDF, because of the bytes that can be used for data on a DVD? I noticed that it's possible to overburn DVDs by using K3b too, but I'm not sure if it's able to gauge realistic values. I didn't use simulation, but I once overburned a DVD successfully. Ralf _______________________________________________ 64studio-users mailing list [email protected] http://lists.64studio.com/mailman/listinfo/64studio-users
