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On 02/11/11 10:59, tom wrote: > it seems dar has -s size - b -p options (s for slice b for bell and p > for pause) Quite a lot of the old backup programs handle splitting media. Split media has a lot of extra issues. You need to make sure you can find the stuff to recover, that errors in one section are contained, etc. As you say Â5 for one backup and a lot of messing around. Or Â50 for 10 as the going rate for branded 1TB drives is now circa Â50, less if you shop around. 2TB are starting at Â60. The hard disk will probably have a 480Mbps writing speed if you have USB3, allowing 100GB to be backed up half an hour to an hour and can be scheduled to run unattended. How fast is your DVD writer? If you have a 16x DVD writer that can actually sustain 16x writing for data, then you are talking about a third of that speed, and you'll need 12 DVDs. So assuming you can change them instantly it is 1.5 hours minimum, it isn't going to be done very often, data will be lost, people will feel sad. That said 24x DVD writers are cheap (Â12) but are often slower on RW media. So might be viable, especially if you just want to backup new stuff. I pondered the options and went for external USB hard disk last time, although I think the difficulty in making and verifying a backup to such media if you REALLY care about the data is under-rated. And ideally of course you'd have 2 for when it all goes bang when the first one is connected. Simon -- The Mailing List for the Devon & Cornwall LUG http://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq