I saw from another post how to do this: by using cat
cat /dev/s > /z/windows7.iso
When I tried it it goes partially then gets
cat /dev/sr0: Input/Output Error
This happens at about 20% completed on one of the dvd's and maybe 3% on the other one.
NB:these are LEGAL original Windows installation dvd's that I had succcessfully installed on older (now defunct laptops). It is very unlikely that both dvds became corrupted /damaged. This has to do with the copying not with the original media
Here is output
steve@mithril:/z$ cat /dev/sr0 > /z/windowsxp.iso cat: /dev/sr0: Input/output error steve@mithril:/z$ ll /z/windowsexp.iso ls: cannot access /z/windowsexp.iso: No such file or directory steve@mithril:/z$ ll /z/windowsxp.iso -rw-rw-r-- 1 steve steve 652869632 Jul 6 13:11 /z/windowsxp.iso