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[Dvdrtools-users] Non-tar.gz archiving options for CD/DVD -- WAS: Burni
From: |
Bryan J. Smith |
Subject: |
[Dvdrtools-users] Non-tar.gz archiving options for CD/DVD -- WAS: Burning a DVD with > 2GB files |
Date: |
19 Jan 2003 22:25:08 -0500 |
On Sun, 2003-01-19 at 22:12, Scott Talbert wrote:
> That is _exactly_ what I'm doing. When I was deciding on a backup
> mechanism (tapes vs DVD), DVD seemed a lot cheaper. I guess I just
> assumed that the tape way, tar.gz, would have been appropriate. I guess
> it's not really a good idea in this case.
Don't feel bad. One of the most horrendous articles I read was a guy
who not only used "tar.gz", but used "split" to fit them across multiple
CDs. Talk about a "single point of failure!"
We have a guy in our local LUG who refuses to change, despite losing his
backups over and over. He's still using CD-RW too (MO media has a much
higher error rate than recordable), and runs into them regularly.
[ In fact, my backup script, back2cd, started out as a request of his. ]
> OK, I'll look into afio. Thanks for the info.
FYI, Mondo Rescue uses afio:
http://www.microwerks.net/~hugo/
It's come a long way. Started out as bash scripts, now it's a full set
of C programs. I've had varied success with it. Mondo Rescue is a
complete "disaster recovery" solution, including making bootable,
self-restoring CDs.
> That sounds like a good idea also. Actually, I would like to read the
> whole article.
It's not on-line (ack!):
http://www.sysadminmag.com/articles/2002/0204/
> Do you know if it is possible to buy the issue in PDF somewhere?
Yes, you can get _all_ the SysAdmin (1992-2002) and Perl Journal
(1996-2002) on CD-ROM for $49 here:
http://www.sysadminmag.com/extra/cd_order.htm
> If not, I will just buy a hard copy.
Alternatively, I was writing a "HOWTO" for my "back2cd". Although it is
far from finished, it _does_ have "Chapter 8: Design" which covers why
"double archiving" is bad (single point of failure):
http://www.smithconcepts.com/files/scripts/back2cd/back2cd_manual.pdf
The script is here:
http://www.smithconcepts.com/files/scripts/back2cd/back2cd.tcsh
[ I highly recommend you get that one, instead of the one from the
SysAdmin mag zip file. Why? Because SysAdmin stupidly packs it in DOS,
and LF/CR are added, preventing the script from running properly unless
you extract with "-a". ]
The "big deal" about my script is that you now have a directly
_browseable_ tree on the CD. No "unarchiving" before looking at it.
The files are just compressed on an individual basis. So it's _awesome_
for "point backups" and "point restores." Especially since it's
designed so users can create their own backups and image files (and then
record them on their own workstation's CD-R drive). It's not designed
as a "total disaster recovery solution" (like Mondo) but I use it to
backup my NFS server's /home which is good enough for me.
BTW, it's only good for single CD backups, not spanning. But it handles
long-filenames, symlinks and other stuff quite well. You can even give
it a list of files to ignore. [ NOTE: You also might need to disable
"Joliet" to cope with long path/filenames -- I run into that when I try
to do my entire /home ]
But it's fast. I use LZO by default (real-time compressor -- 3-5x
faster than GZip, but only about 10-15% less compression), makes a 600MB
image with 1-1.6GB of data in ~5-7 minutes, 4.5GB image with 7.5-14GB om
about 35-50 minutes. LZO is also good about recognizing pre-compressed
files after the first block or two, and storing them uncompressed
(unlike GZip/Bzip2).
For more on comparison of LZO (lzop) v. LZ77 (GZip) v. BWT (BZip2), see
this post of mine:
http://www.matrixlist.com/pipermail/leaplist/2001-December/016244.html
--
Bryan J. Smith, E.I. (BSECE) Contact Info: http://thebs.org
[ http://thebs.org/files/resume/BryanJonSmith_certifications.pdf ]
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"Bryan J. Smith uses a modicum of talent and a membership in IEEE
to harass others and show off" -- Peter Buxton
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- Re: [Dvdrtools-users] Burning a DVD with > 2GB files, (continued)
- Re: [Dvdrtools-users] Burning a DVD with > 2GB files, Scott Talbert, 2003/01/19
- Re: [Dvdrtools-users] Burning a DVD with > 2GB files, André Dalle, 2003/01/19
- [Dvdrtools-users] Re: Burning a DVD with > 2GB files -- What files are you'all burning >2GB???, Bryan J. Smith, 2003/01/19
- Re: [Dvdrtools-users] Re: Burning a DVD with > 2GB files -- What files are you'all burning >2GB???, Sean, 2003/01/19
- Re: [Dvdrtools-users] Re: Burning a DVD with > 2GB files -- What files are you'all burning >2GB???, Bryan J. Smith, 2003/01/19
- Re: [Dvdrtools-users] Re: Burning a DVD with > 2GB files -- What files are you'all burning >2GB???, Robert M. Stockmann, 2003/01/19
- Re: [Dvdrtools-users] Re: Burning a DVD with > 2GB files -- What files are you'all burning >2GB???, Sean, 2003/01/19
- Re: [Dvdrtools-users] Re: Burning a DVD with > 2GB files -- What files are you'all burning >2GB???, Robert M. Stockmann, 2003/01/19
- Re: [Dvdrtools-users] Re: Burning a DVD with > 2GB files -- What files are you'all burning >2GB???, André Dalle, 2003/01/19
- Re: [Dvdrtools-users] Re: Burning a DVD with > 2GB files -- What files are you'all burning >2GB???, Scott Talbert, 2003/01/19
- [Dvdrtools-users] Non-tar.gz archiving options for CD/DVD -- WAS: Burning a DVD with > 2GB files,
Bryan J. Smith <=
- [Dvdrtools-users] Re: Non-tar.gz archiving options for CD/DVD -- "afio" HOWTO ..., Bryan J. Smith, 2003/01/19