In the true art of a self follow-up, I wrote:-
On Wed, 21 May 2008, jdd sur free wrote:-
Legacy lead-out at: 2298496*2KB=4707319808 Free Blocks: 2297888*2KB
These data are written by the maker. I wonder if these noname dvd are a little under the nominal capacity?
It looks like it.
Now I'm really curious. Actually writing a disc with the full 2,298,496 sectors fails: davjam@lion:/local> growisofs -Z /dev/dvd=blank.image.iso -dvd-compat -speed 4 Executing 'builtin_dd if=blank.image.iso of=/dev/dvd obs=32k seek=0' /dev/dvd: "Current Write Speed" is 4.1x1352KBps. 3014656/4707319808 ( 0.1%) @0.7x, remaining 104:01 RBU 100.0% UBU 2.0% 12288000/4707319808 ( 0.3%) @2.0x, remaining 44:34 RBU 100.0% UBU 100.0% 21561344/4707319808 ( 0.5%) @2.0x, remaining 36:13 RBU 100.0% UBU 100.0% 30834688/4707319808 ( 0.7%) @2.0x, remaining 35:23 RBU 100.0% UBU 100.0% 40108032/4707319808 ( 0.9%) @2.0x, remaining 32:58 RBU 100.0% UBU 100.0% 49348608/4707319808 ( 1.0%) @2.0x, remaining 31:27 RBU 100.0% UBU 100.0% 58621952/4707319808 ( 1.2%) @2.0x, remaining 31:43 RBU 100.0% UBU 100.0% 67895296/4707319808 ( 1.4%) @2.0x, remaining 30:44 RBU 100.0% UBU 100.0% ..... 4623040512/4707319808 (98.2%) @4.0x, remaining 0:16 RBU 100.0% UBU 98.0% 4633690112/4707319808 (98.4%) @2.3x, remaining 0:14 RBU 100.0% UBU 100.0% 4652204032/4707319808 (98.8%) @4.0x, remaining 0:10 RBU 100.0% UBU 100.0% 4670750720/4707319808 (99.2%) @4.0x, remaining 0:07 RBU 100.0% UBU 100.0% 4689297408/4707319808 (99.6%) @4.0x, remaining 0:03 RBU 100.0% UBU 98.0% 4706074624/4707319808 (100.0%) @3.6x, remaining 0:00 RBU 100.0% UBU 100.0% :-[ WRITE@LBA=231020h failed with SK=5h/ASC=21h/ACQ=02h]: Invalid argument :-( write failed: Invalid argument /dev/dvd: flushing cache /dev/dvd: updating RMA /dev/dvd: closing disc And the failure point is after 4,706,074,624 bytes have been written, which works out to be 2,297,888 sectors. So, from this, it looks like the combination of growisofs on openSUSE 10.3 PPC, the writer I'm using, and the media get the maximum free size wrong and it should actually be 608 sectors, or 1,245,184 bytes, less than reported. I guess the reason I've never actually noticed this is purely because I normally don't write discs with more than about 4.35GiB. Normally I aim to make sure they are closer to the 4GiB mark. This leaves just that little bit of extra space at the edge of the disc, just in case someone isn't quite as careful as I am, and leaves partial finger prints on the outside edge of the disc. Regards, David Bolt -- Team Acorn: http://www.distributed.net/ OGR-P2 @ ~100Mnodes RC5-72 @ ~15Mkeys SUSE 10.1 32bit | openSUSE 10.2 32bit | openSUSE 10.3 32bit | openSUSE 11.0b3 SUSE 10.1 64bit | openSUSE 10.2 64bit | openSUSE 10.3 64bit RISC OS 3.6 | TOS 4.02 | openSUSE 10.3 PPC | RISC OS 3.11 -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org