[PlanetCCRMA] Writing fc4 iso dvd fails with error

[Rick B]

I've tried multiple ways (xcdroast,f3b,growisofs) to burn the FC4 dvd 
iso on my FC2 box with kernel 2.6.11-0.3.rdt.rhfc2.ccrma kernel. It will 
burn for a little while and then quit with the error:

:-[ WRITE at LBA=ed5f0h failed with SK=4h/ASC=09h/ACQ=01h]: Input/output error
builtin_dd: 972272*2KB out @ average 0.9x1385KBps
:-( write failed: Input/output error
/dev/hdc: flushing cache
:-[ FLUSH CACHE failed with SK=4h/ASC=09h/ACQ=01h]: Input/output error

Last time using growisofs it made it all the was to 75% complete before 
it quit. Any ideas what's causing this? The media is an dvd-rw. TIA.

                         Rick B