On 10/14/2010 02:26 AM, Tim wrote: > On Wed, 2010-10-13 at 12:05 -0400, Paul Cartwright wrote: >> I normlly burn with speed=4. but > Tangential question: Are you guys using media that supports such slow > speeds? And, if you are not, and if you could previously burn slower, > that might be down to burning software overriding the data that the disc > says. > > I say this because I've seen, in at least in some DVD media, discs > reporting that they support only a few speeds, none of which was 1x. > Which, theoretically, would preclude reliably using them in standalone > DVD video recorders, as a straight record TV to DVD is done at single > speed. And, I'm sure, a similar situation will exist for CD media. > > It's common for the media to report that it can burn at a few specific > speeds, and you have to hope that some of them match the speeds that > your burner can run at. > > $ dvd+rw-mediainfo /dev/dvd > INQUIRY: [HL-DT-ST][DVDRAM GSA-T20N ][WR02] > GET [CURRENT] CONFIGURATION: > Mounted Media: 10h, DVD-ROM > Media ID: MCC 03RG20 > Current Write Speed: 8.0x1385=11080KB/s > Write Speed #0: 8.0x1385=11080KB/s > Write Speed #1: 4.0x1385=5540KB/s > Speed Descriptor#0: 02/2285887 R@xxxxxxxx=2292KB/s W@xxxxxxxx=11080KB/s > Speed Descriptor#1: 02/2285887 R@xxxxxxxx=2292KB/s W@xxxxxxxx=5540KB/s > > The above example is from a Verbatim DVD-R disc. According to the disc, > itself, it can *only* be written at 8x or 4x. I don't have any other > writeable media to hand, at the moment, to test. > > While you may get away with forcing some media to burn at unsupported > speeds, I can well imagine there being reliability problems. Just like > photography, burning a disc needs the right balance of laser exposure > power and exposure time. Some high speed media may be optimised for > only burning at high speed. > Well, here are the SONY media CD speeds: GET [CURRENT] CONFIGURATION: Mounted Media: 1Bh, DVD+R Media ID: SONY/D21 Current Write Speed: 8.0x1385=11080KB/s Write Speed #0: 8.0x1385=11080KB/s Write Speed #1: 6.0x1385=8310KB/s Write Speed #2: 4.0x1385=5540KB/s Write Speed #3: 2.4x1385=3324KB/s But no matter what speed I specify to wodim, it jumps to 10x even though the media does not even support 10x. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
