Alan Stern <stern@...> writes: > > On Mon, 10 Dec 2012, Golmer Palmer wrote: > > > Alan Stern <stern@...> writes: > > > > > > > > Right. This limit represents a hypothetical 256-minute CD. > > > > 256 minutes CD, ok! (75 represents 75 sectors/sec) > > Yes. So 255M:60S:75F > > > > > Nevertheless, with a DVD the maximum sectors are 4,173,824 (DVD-9 DL). So > > why > > > > this limit? As we can supose that the driver can work with a DVD ISO image, > > why > > > > not increase the limit to DVD specs? > > > > > > Although the driver can work with a DVD ISO image, it does not emulate > > > a DVD. Only a CD. > > > > Yes, not a DVD. But if you "mount" a DVD image with the cdrom emulation, it > > works! So, please, update the limit to 950*60*75 (4,275,000 sectors). This is an > > hypothetical 950 minutes CD-ROM, with a size bigger than a DVD-9 "DATA" disk. > > I can't. The CD spec requires that under certain conditions, block > addresses on the device be presented in "MSF" format, where M is > minutes, S is seconds, and F is frames, and each occupies a single > byte. There's no way to represent more than 255 minutes. Ok, now I know why this limit! I feel that in the future a CD/DVD/BD USB gadget driver can be interesting. > Alan Stern I'll post my tests over the patches for cdrom booting when I can apply them to my Android device. Thank you Alan! -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
