Date: Sun, 1 Jul 2007 09:39:09 -0500 From: Jonathan Horne <freebsd@dfwlp.com> To: freebsd-questions@freebsd.org Subject: Re: backing up dvds Message-ID: <200707010939.09739.freebsd@dfwlp.com> In-Reply-To: <46878DCD.8060604@otenet.gr> References: <000301c7bb60$264eee30$0200a8c0@satellite> <20070701101326.GB63587@slackbox.xs4all.nl> <46878DCD.8060604@otenet.gr>
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On Sunday 01 July 2007 06:19:41 Manolis Kiagias wrote: > Roland Smith wrote: > > On Sat, Jun 30, 2007 at 05:39:29PM -0500, Jonathan Horne wrote: > >> On Saturday 30 June 2007 16:46:36 Dave wrote: > >>> Hello, > >>> I've got a 6.2 box with a dvd writer in it. I want to back up some > >>> dvds to iso files so i can recreate the dvds at a later time should it > >>> be needed. I can use dvdbackup to backup in to a directory structure, > >>> but i'd rather not mount, create the directory, and iso, i'd rather > >>> make the iso directly from the dvd. Any pointers on this? > >>> Thanks. > >>> Dave. > >> > >> dd if=/dev/acd0 of=/path/to/filename.iso bs=1024 > > > > That should be bs=2048. > > > > AFAIK, data CDs and DVDs have 2k blocks: > > > > slackbox:~/tmp$ dd if=/dev/cd1 of=foo.dvd bs=1024 > > dd: /dev/cd1: Invalid argument > > 0+0 records in > > 0+0 records out > > 0 bytes transferred in 0.000146 secs (0 bytes/sec) > > > > slackbox:~/tmp$ dd if=/dev/cd1 of=foo.dvd bs=2048 > > ^C10270+0 records in > > 10270+0 records out > > 21032960 bytes transferred in 5.096854 secs (4126655 bytes/sec) > > > > Roland > > Roland is right, the blocksize is 2048 bytes. > In fact the following page is a very nice read: > > http://www.troubleshooters.com/linux/coasterless.htm > > The dd command would do a much more accurate image if you also specify > the length. The process is described in the page above. > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "freebsd-questions-unsubscribe@freebsd.org" hehe, shame on me for trying to recall that memory, instead of actually looking it up (which is exactly what i do, each time to run an .iso file off... just to make sure im remembering correctly!) cheers, -- Jonathan Horne http://dfwlpiki.dfwlp.org freebsd@dfwlp.com
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