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On 11/05/17 16:15, Eion MacDonald wrote: > You could always set up a 'non live', but external say 16 Gb or 32 GB > USB key with an *installed* Linux OS system other than your present one. > It has some persistence, (as 'external hard disc' ) but must be created > on your system so GRUB2 gets its act together. BE CAREFUL not to install > over your existing system OS. > > I use this to allow a linux system with more than basic Live Linux disc > to be used on Vista machines without altering the existing set up for > browsing with folk I help, before we go down road of dual booting or > wiping Windows Vista off machine. > > I also use it on my Linux box to try out other systems with some degree > of 'extra things' over the live linux or install basic selection. Now that definitely is an option worth looking at, and a properly setup 'live' USB Linux instance with persistence is a really handy thing to have to hand anyway, so that's a good point. The only issue then is the relatively terrible bandwidth and latency of even v3 flavoured USB vs SATA. His laptop doesn't have enough RAM to cache the entire OS and service normal running overheads either which is why I initially discounted it. And your warning about being really careful with the GRUB install is spot on! > To prove a 'duff disc' have you any other nearby folk who can try it on > a Windows set up (case 1, as you have already tried a mac) and on a > different Linux set up (case 2*)? > Case 2* could be as external USB above. > If at worst, ask, and then post to me to try. > (I have Windows 10 Pro (modern machine), Older circa 2006 machines with > OpenSUSE 42.2 XFCE, Ubuntu 16.04, Knoppix set ups etc.) I'm pretty sure Anthony said the laptop in question is already dual booting Windows, and it doesn't work there either - and he has internal and external DVD drives on hand, so I presume he's tried both drives under both operating systems on the same machine as well as 2 (?) other Linux laptops he's got in the house so he has really covered the obvious options already. If anything the real surprise is that the DVD in question has managed to play back correctly on anything! Cheers -- The Mailing List for the Devon & Cornwall LUG https://mailman.dclug.org.uk/listinfo/list FAQ: http://www.dcglug.org.uk/listfaq