On 14/09/2019 13:10, Broadback wrote:
It is HL-DT-ST DVDRAM GH245NSDO. I have 700MB ones, but these are not
large enough to make a Boot-able recovery disc with Acronis. so what are
the larges capacity DVDs that this drive will work with please?

https://www.ecma-international.org/p...T/Ecma-267.pdf

Page 11

"The disk shall have an overall diameter
d1 = 120,00 mm ± 0,30 mm "

:-p

Seriously, Single layer 4.7GB DVD-R should be sufficient, Acronis will
request additional disks if you backup extends above.

https://en.wikipedia.org/wiki/DVD

--
Adrian C