Zaphod Beeblebrox (21:12 2009-09-20): > On Sun, Sep 20, 2009 at 4:35 PM, Richard Mahlerwein <mahle...@yahoo.com>wrote: > > > > > I have had several exhibit behavior even more odd. > > > > The most unusual was this particular CD writer... It read both DVDs and CDs > > but would write neither (it had worked fine the week before). I took it out > > of the drive bay and hooked it to another PC to test and it worked fine > > there. I put it back in the original PC and it failed. I was swapping > > things around on that PC (assuming bad cable, bad power, etc) and had it > > sitting loose on the desk and found that it now worked again. Put it back > > in the drive cage and it again would not write, though reading was fine. > > Anyway, I finally figured out that even slight pressure in on the sides > > where it mounts would make it fail to burn CDs. The cage itself exerted a > > bit of pressure and that was enough to make it fail at any attempt to burn a > > CD. > > > > This is not necessarily odd. The CD burner is one of the highest draw bits > in your system... save possibly your CPU and/or graphics card (depending on > what they are). I have found that various DVD drives have been very > sensitive to power supply voltages and fail to burn properly when they're > marginal. Your description here seems to point in that direction. If it > works in computer B, try using B's power supply for A --- or maybe B has > other lighter draws. > > Power supplies can also degrade over time --- especially if you have some > cheap capacitors in there. > > I find the DVD drive is often the canary for spotting power supply problems.
Hi, I have the same problem. I can read DVDs and CDs and write CDs, but I'm unable to write DVDs. I can't be sure that it is a software problem, but I think it happened when upgrading from 8.0-BETA2 to 8.0-BETA4. Not sure at all though. Martin _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
