[ Sent to both -release and -cd; please respect the reply-to: -cd ] There's been quite a lot of discussion lately about releasing sarge on dual-layer DVD; it's clearly attractive for CD/DVD vendors to be able to sell one disc that covers Debian, and for the end user it's much easier to boot and install from a single disc with no swapping/flipping needed. I've been looking up specs for this, in particular sizes. According to http://www.disctronics.co.uk/technology/dvdrom/dvdrom_specs.htm and various other pages google can find: a single-sided single-layer DVD (aka DVD-5) holds 4.7e+9 bytes a single-sided dual-layer DVD (aka DVD-9) holds 8.5e+9 bytes There are always going to be slight variations in media sizes, but to be safe we need to ensure that all the images we produce are no bigger than these. We currently should be OK on sizes to be able to release sarge on 2 single-layer DVDs for each arch; the latest set from Manty is i386/i386-1 4610738176 bytes i386/i386-2 4369008640 bytes ia64/ia64-1 4596054016 bytes ia64/ia64-2 4351143936 bytes powerpc/powerpc-1 4443107328 bytes powerpc/powerpc-2 4580755456 bytes powerpc/powerpc-3 129437696 bytes The powerpc set clearly needs tweaking a little :-) Also, we need to produce source DVDs also at the very least. However, for the dual-layer DVDs we've been hoping to make, we're already too big. A test at the weekend gave me: 8604024832 sarge-i386-1.iso We're going to have to start trimming things if we want dual-layer DVDs to work for the sarge release. Suggestions? Of course, another option is to go for dual-sided single-layer DVD (aka DVD-10), but that loses much of the convenience for the user. Comments? -- Steve McIntyre, Cambridge, UK. steve@einval.com Into the distance, a ribbon of black Stretched to the point of no turning back
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