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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
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1 Answer 1

up vote 0 down vote accepted

Try using dd. sudo dd if=/dev/sr0 of=/path/to/output/file.iso

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That yields an immediate "dd: reading '/dev/sro': Input/Output error. But wait, i tried a second time and it appears to have worked. Will get back. –  javadba Jul 6 '13 at 20:35
Should be sr0 not sro :D. If you did actually type sr0 then Are you sure sr0 is the device file for the CD? Did you use sudo? And have you unmounted the CD before trying this? –  handuel Jul 6 '13 at 20:36
i just "historied" the same command it appears to have worked second time. –  javadba Jul 6 '13 at 20:37
One of the two did "dd" properly but vmware installation failed, possibly unrelated. But for the other, it still only completed 3% before Input/Output error. I am going to try to install directly on old computer to prove one way/other if/not it were media problem. –  javadba Jul 6 '13 at 20:49

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