Hi, >>> # tar -Mcvf /dev/cdrom /some/files > This seems to work fine. I copied a 1.2 GB file to a DVD+RW using this > method, and it verified OK. This technique gave an average data transfer > rate of 3.1 MB/s.
I am thoroughly astonished. ... and pondering wether i should try this too ... (I'm reluctant to do strange things with my system) >> My approach would be >> tar cvzf - /some/files | \ >> growisofs -use-the-force-luke -Z /dev/sr0=/proc/self/fd/0 >> >> (tar option -M is still a bit obscure to me after >> reading man and info tar. Is it about end-of-tape >> handling ?) > > Although using growisofs in that manner is probably a more comaptible > and reliable method, the main problem is that it can not readily split > the image across multiple DVDs on-the-fly, as far as I am aware. The -M > option of tar is to allow a tar file/stream to be split across multiple > volumes. Thus when the end of a tape is reached, a new tape can be > inserted and writing can continue. The M option appears to work when > writing to DVD as well, although I haven't yet tried it with growisofs. > Thus > # tar -Mcvf /dev/cdrom /some/files > will split the tar file across multiple DVDs if necessary. It's a bit of > a hack, but it seems to work. This does astonish me even more. To get an end-of-tape usable with tar ... you have a miracle wonder /dev/cdrom in your system. There are projects like Paul Serice's shunt http://www.serice.net/shunt/ or my own one http://scdbackup.webframe.org which deal with multi-volume backups on CD/DVD. We both carefuly avoid to overflow the media but divide the backup data into digestible pieces in advance. (In the most simple case one just needs a filter program which stops writing before an overflow occurs, asks for the next media and starts a new run of growisofs. Nevertheless it is desirable to get media which are not totally dependent on each other.) Does this trick work with CD-RW too ? Does anybody know what makes it work ? It looks like Andy's kernel patch described on the dvd+rw-tools homepage http://fy.chalmers.se/~appro/linux/DVD+RW/ > Also I can't seem to get growisofs to > write faster than 1x. But that's another problem altogether... What DVD+RW media do you use ? What does dvd+rw-mediainfo report ? (You did try option speed=... , i presume) Have a nice day :) Thomas -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
