[PLUG] Backing up data to DVD
Steve Bonds
1s7k8uhcd001 at sneakemail.com
Fri Aug 27 12:55:02 UTC 2004
On Thu, 26 Aug 2004, Roderick A. Anderson raanders-at-acm.org |PDX Linux| wrote:
> Long ago and far away but I do seem to remember this. It has now become
> important. I have client/friend that would like a quick backup/restore
> method for, actually, a very small amount of data. They have a tape drive
> and we'll be moving it to the server soon (don't ask and I won't tell --
> it is a twisted story).
> I'll probably vary this a bit to meet their needs of slipping a CD/DVD
> into a workstation drive and copying over the bogus files.
If you have a choice, use CD-R media instead of DVD. I've had much lower
read error rates with them.
Also, the script I gave is not specific to DVD other than the -B parameter
it feeds to the dump command. It backs up locally to /backups/levelX,
leaving the choice of copying out to DVD up to you.
Here's how to do that:
growisofs -dvd-compat -Z /dev/dvd -R -J -udf file1 file2 file3
The "-dvd-compat" writes a long lead-out to ensure maximum compatibility
with DVD-ROM drives. Some of them might choke if the disk is only
half-burned since they sometimes do a power calibration at around the 2GB
mark.
-r: Generate "rationalized" rock ridge extensions. If you have specific
owner/permission needs then use -R instead.
-J: Generate Windows Joliet extensions
-udf: Don't make an ISO9660 filesystem, make a UDF filesystem
Unlike the DVD-patched cdrecord, there are no speed or burnfree options on
growisofs, however it works with both DVD-R/-RW and DVD+R/+RW media.
(cdrecord only works with DVD-R/-RW)
You can also use K3b, but all it does is call growisofs. ;-)
To back up to CD instead, change the -B parameter to 665600.
-- Steve
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