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"Robert Longbottom" <RobertCL@×××××.com> posted |
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36655.144.98.76.45.1150875071.squirrel@××××××××××××××××××.net, excerpted |
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below, on Wed, 21 Jun 2006 08:31:11 +0100: |
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> I've noticed similar problems - some dvd's that I burn can only be re-read |
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> in my burner and not in my other dvd-rom drive. But some work. |
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> |
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> I've wondered if it is something to do with the disc variant -R, +R and |
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> all that, but I've never really looked into it. Now I always test that I |
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> can read back the contents of the disc to a temp directory just to be sure |
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> it works. |
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It could be. The author of CDRecord has a bit of a feud going with the |
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Linux kernel hackers over the proper way to handle SCSI (thus the bit in |
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there about 2.6 kernel support) and has refused to add DVD support to the |
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GPL version as well, because he charges for that and has it in his |
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slaveryware version. Various distributions have hacked DVD support in, |
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but there's a bit of difference between the -R and the +R support, the |
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details of which I'm not too sure of myself. |
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A quick esearch reveals dvdrtools, a fork of cdrtools including dvd |
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support. That must be the version various distributions are using, given |
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Schily's refusal to add dvd support to his freedomware cdrtools. |
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There's also dvd-rw-tools. |
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Here, I just use k3b for burning and let it worry about most of the |
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details. So far, it has "just worked". |
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The problem might also be with "session-at-once" vs. "disk-at-once". A |
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multi-session CD/DVD won't be closed out at the end of writing, thus |
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allowing additional sessions to be added. After the last session you are |
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supposed to close out the disk. Some ROM drives won't be able to read the |
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un-closed disks until they are closed out, altho any burner should still |
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read it just fine. I always use (and verify the setting of) disk-at-once in |
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k3b, since I never do multi-session disks. |
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Due to the way sessions work, with a lead-in and a close-out for each |
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session as well as the entire disk, each session wastes a bit of capacity, |
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so a multi-session disk won't be able to store the same amount of bytes as |
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a disk-at-once disk. The more sessions, the more wasted capacity and less |
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available storage. Both for this reason and due to the disk-closeout |
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issue on CD/DVD-ROM drives, I find it less hassle to just do disk-at-once |
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and not worry about individual sessions. |
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-- |
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Duncan - List replies preferred. No HTML msgs. |
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"Every nonfree program has a lord, a master -- |
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and if you use the program, he is your master." Richard Stallman |
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-- |
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