Carlos E. R. wrote: > > The Friday 2007-04-27 at 12:50 +0100, G.T.Smith wrote: > > > I haven't really tried it yet, it is on my to do list. I do my backups to > other HD and manually to DVD. Not an automated solution. > > > > >>> A further > >>> complication is although kdar apparently offers a 4Gb slice size > for DVD > >>> the dvdtools burning tools will only accept a max of 2Gb per file > >>> (slice). > >> Yes. I haven't looked at it for use with dar, but you know that you are > >> not limited to iso images for dvd burning: I myself use XFS, wich > doesn't > >> have that limitation. I wonder I f I could use them from dar. > > This 2Gb file size limit seems to be a linux thing with DVDs not sure > > whether this is just t wodim or what. > > I believe it is a limitation of the iso format. As I mentioned, I burn > DVDs in XFS format and I have no such limitation. I came across something which very was critical of the decision to set this limit for linux iso support, but again cannot remember whether this is was criticism of wodim or something else or a completed uninformed rant (iso9660 has a number of non-standard extensions which can let you get a way with a lot of things).
I would not like to try setting up XFS on DVD- media which is effectively sequential... XFS is not a universally used file system and there are apparently issues in compatability between different distributions on Linux which are although recoverable, I would be wary of using on optical media. I tend towards the view that when using portable and removable media such CD/DVD one should stick to format which is not going to be too closely tied to a particular configuration. Also issues such as media detection and calculating available storage come to mind.... BTW Did try the experiment of creating an XFS file system on a DVD out of curiosity, and my writer just did not want to know, (which did not surprise me a lot to be honest)... had I have a feeling I played around with this a long time ago and it was a non starter then... > > > >>> (And not even that... setting slice size to 2Gb still caused > >>> problems). > >> At 2 GB, 400 MB are wasted. Better four slices of 1.1 GB. > > Still 400k wasted with 4Gb according to kDar (DVD slice is set as 4.3Gb) > > 4 * 1.1 = 4.4, no waste. BTW Spot the my not so deliberate mistake .... the 4.7 on the box == 4.3 in computer terms ;-) Actually, in a multi media scenario would probably go for slice size that would balance asynchronous dvd writes.... if you have 5Gb of data you will still be using 8.6 Gb of media and at this moment multi-session data writing is not available in wodim... > > > >> I still have to evaluate dar, but I should think it makes an index to > >> facilitate this. Any good backup solution should handle this. > > External index an option, but then one has to transfer the index to DVD > > to make it available. (loops within loops) And it does not deal with > > issue of which part of the media set a particular file is on. > > I don't know how dar/kdar deal with it, but it should be done > automatically. Ie, choose a file, and the program should ask for the > exact > dvd(s) to be mounted. The user should not be bothered with details. > It does not, it will know the slice but not the DVD, it does not manage removable media merely the slices that are put on the media... it seems to up to the user to organise the CD/DVD writing... If the DVD is a empty mounted file system it could write to that (but see above...) [Stuff deleted] -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
