From 4a7923ce4e59a05daa7d6bb8ced6d503ba94e774 Mon Sep 17 00:00:00 2001 From: Thomas Schmitt Date: Thu, 2 Aug 2007 08:32:50 +0000 Subject: [PATCH] Took into respect new info from Andy Polyakov about closing DVD+-R --- cdrskin/cdrskin.1 | 19 +++++++++++++++---- doc/cookbook.txt | 15 +++++++++++++-- 2 files changed, 28 insertions(+), 6 deletions(-) diff --git a/cdrskin/cdrskin.1 b/cdrskin/cdrskin.1 index 643efbd..7d22271 100644 --- a/cdrskin/cdrskin.1 +++ b/cdrskin/cdrskin.1 @@ -190,6 +190,11 @@ DVD+R. Quite deliberately write mode -sao insists in the tradition of a predicted track size and blank media, whereas -tao writes the tracks open ended and allows appendable media. +.br +.B Note: +Option -multi might make DVD media unreadable in some DVD-ROM drives. +Best reader compatibility is achieved without it +(i.e. by single session media). .PP .B Overwriteable DVD Media: .br @@ -465,7 +470,10 @@ program. mkisofs and genisoimage expect particular info about the situation which can be retrieved by cdrskin option -msinfo. .br To retrieve an archive file which was written as follow-up session, -you may use option -toc to learn about the "lba" of the desired track number. +you may use option -toc to learn about the "lba" of the desired track number. +This lba is the address of the 2048 byte block where the archive begins. +.br +Note: -multi might make DVD media unreadable in some DVD-ROM drives. .TP .BI \-nopad Do not add trailing zeros to the data stream. Nevertheless, since there seems @@ -796,9 +804,12 @@ This option overrides option -multi. It will not fill up media if option -sao is given with CD media. .br .B Caution: -This option might increase read compatibility with DVD-ROM drives but -with some DVD recorders and media types it might also fail to produce readable -media at all. "Your mileage may vary". +With multi-session media this option might increase readatibility on DVD-ROM +drives but with some DVD recorders and media types it might also fail to +produce readable media at all. "Your mileage may vary". +.br +You can expect the best possible read compatibility if you do not use -multi at +all. .TP .BI grab_drive_and_wait= seconds Open the addressed drive, wait the given number of seconds, release the drive, diff --git a/doc/cookbook.txt b/doc/cookbook.txt index da9b150..3a68fe1 100644 --- a/doc/cookbook.txt +++ b/doc/cookbook.txt @@ -1088,8 +1088,19 @@ closed by Close Function 101b rather than 010b. This finalizes the media "with minimal radius". (mmc5r03c.pdf 6.3.3.4.4) -Note: growisofs has code for that gesture but explicitly avoids to use it. -Instead it recommends to fill up the media with zeros. +Note: growisofs has code for that gesture but explicitly avoids to use it, if +the media was appendable before writing began. Instead it recommends to fill +up the media with zeros. This gesture nevertheless caused error replies from +the drives in my own experiments. +The reason given by Andy Polyakov is that some DVD-ROM drives get mislead by +the lead-out information of (formerly) appendable media unless the media is +fully written. +(http://fy.chalmers.se/~appro/linux/DVD+RW/ , "Compatibility: caveat lector") + +Own experiments showed no such problems with PC attached PATA DVD-ROM drives. +For best DVD-ROM compatibility one should avoid appendable media at all +by closing them already after the first session. + ------------------------------------------------------------------------------- Hearsay about DVD+R/DL (Dual Layer) :