From: Andy Polyakov <[EMAIL PROTECTED]> Subject: Re: Problems when writing DVDs with growisofs Date: Tue, 11 Jul 2006 18:39:58 +0200
> > What data transferrate would you exspect while writing to a DVDRAM? > > What does media case say? 3x? 2x? But no, not that much... Hmmmm...the media case is a plastic box witn a slider. Inside is a two sided DVDRAM. The writing on the slider says: Verbatim DVD-RAM 9.4GB - 4.7GB/side rewriteable TYPE A below that there is the DVD-logo with "RAM RAM 4.7" added Beside "SIDE A" and "SIDE B" there nothing more on the media. I can removed the media from the box for writing. > > I know, that is slower than DVD+/-RW, since it does verify the data, > > Keep in mind that data written to DVD-RAM is verified immediately upon > write only when explicitly asked for with WRITE AND VERIFY > command[*]. ...Am I right here ?:"When writing to a DVDRAM with growisofs I will get a filesystem identical to that of a DVD: udf or iso9660." > Otherwise data verification is performed upon later playback and if > block smells deteriorated, then the data is transparently moved to spare > area. It should also be noted that advertised velocity of 2-3x can only > be observed when you switch off defect control system [or bypass it be > means of "streaming recording"[**]]. So that as defect control is > [presumably] on by default, you're likely to observe lower speeds, 1x if > not less, so that an order of one hour magnitude for 4GB should be > reasonable... > > [*] growisofs can do this with -use-the-force-luke=wrvfy, also note that > Linux kernel does *not* do anything of that sort; > [**] for technically minded "streaming recording" refers to WRITE(12) > with "streaming" bit set; > > > but with my setup it takes hours to write 4GB... > > > > Hardware: LG 4163B (A106 firmware, newest stable) > > Software: Linux 2.6.17.4 (newest stable) > > > > formatted with udf (udftools) > > Mounted directly (no pktcdvd...) > > I wouldn't put so much faith to Linux UDF write performance. Use ext2 or > stick to growisofs:-) One way or another it hardly have anything to do > with pktcdvd. A. I heard, that using ext2 or such will kill DVDRAM soon, since there are sectors (blocks? or whatever it is named ... sorry, I am not a native English speaker...) constantly written to, so they will die to soon since there max. write count has been reached. [ ] true ? [ ] false ? Thanks a lot for your help in advance, Andy ! :) Keep hacking! mcc -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]