Messages in this thread |  | | From | "J. Dow" <> | Subject | Fw: failure to burn CDs under 2.4.0-test9 | Date | Fri, 6 Oct 2000 00:36:21 -0700 |
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----- Original Message ----- From: "J. Dow" <jdow@earthlink.net> To: "Andre Hedrick" <andre@linux-ide.org> Sent: Friday, October 06, 2000 0:35 Subject: Re: failure to burn CDs under 2.4.0-test9
> From: "Andre Hedrick" <andre@linux-ide.org> > > > On Thu, 5 Oct 2000, J. Dow wrote: > > > > > For that matter Andre a 4 speed HP can certainly burn at 4 speed except > > > that cdrecord and the OS conspire to prevent this through a mathematical > > > error. It's rather a tad frustrating. > > > > Explain, please > > I skipped all the mkisofs stuff. I downloaded the 7.0 images and tried to > burn them to CDROM on CDs rated for 6 speed and a drive, HP CDWriter+ 8100, > rated for 4 speed on write. The system is an Athlon 700MHz with a K7M > board. The CDWriter+ is IDE. The OS at the time was the -22 build from > RedHat's pinstripe/.../preview directory recompiled in an attempt to > make the via82cxxx_audio work. (It works right under 2.4.0-test8 I am > running now.) > > > cdrecord -v speed=4 dev=0,0,0 -eject -data $ISO9660_PATH/cd_image > > Remarkably similar to the command I used. It still burned at 2 speed. I > traced through the cdrecord code and three levels of OS driver finding > several conversions from nominal speed ratings to "precise" speed ratings. > The tool concluded that the drive had reported it could do 700kB/S while > the software insisted it needed to be capable of at least705.6kB/S. It > looked like in some places the kernel used a nominal 175kB/S as the > conversion figure and in others 176.4kB/S. About then the maze of twisty > little passages and the loss of time to persue it to a conclusion wore > thin and I moved on to making money to pay for my food and housing and > clothing by being a mercenary instead of philanthropist. I could have > done a quick hack to cdrecord except it appears to be intimately tied > to too many other things for which I'd have to install source and deal > with. 'Sides, it looked like the kernel was slightly internally schizoid. > That MIGHT be the proper place to repair things. And ide-scsi or ide-cd > might be the proper place to start investigating. > > This problem seems to have existed since 2.0.xx days when I first noticed > I could not get cdrecord to even TRY to record at the drive and disc > rated speeds. (Nor can I get it to do it with 2.2.16 on a machine with a > SCSI HP CDWriter+ 9200 which won't do its rated speed, either.) > > {^_^} > >
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