Hi, > I have burned the iso image (4683169792 bytes) on the DVD+RW. (The image was > already rounded up to the closest 32KB). > ... > I wanted to verify the result in my DVD-ROM (Toshiba SD-M1802), but I was able > to read only 4683167744 bytes (exactly the image size - 2048). I tried "dd > if=/dev/dvdrom bs=2048", "wc -c /dev/dvdrom", "cksum /dev/dvdrom"... > > Then I returned this DVD+RW back into my DVD recorder (Teac DV-W516GA) and > also > tried the to "dd if=/dev/dvdrw bs=2048" and "wc -c /dev/dvdrw". This time it > returned 4700372992 bytes (whole media capacity)...
I have experienced similar effects with LG DVD-ROM and LG DVD-writer. No missing 2 kB, though. Depending on DVD reader drive, its device driver, previous usage of the media, and possibly other parameters, i get a varying number of surplus bytes when checkreading. Since you are not the first who reports of a few missing kB with DVD, i cowardly add 300 kB of padding to any image that i write to DVD (as i do with CD). mkisofs usually adds the same padding on its own by option -pad which is default. So if your image file on disk and the image on DVD match up to the last 2 kB, your ISO image payload should be undamaged. Have a nice day :) Thomas -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
