[Debburn-devel] Error message for command "readom -fulltoc dev=/dev/dvd"
Thomas Schmitt
scdbackup at gmx.net
Sat Jul 14 12:59:52 UTC 2012
Hi,
> I guess it is a typo and you meant:
> 43 00 02 as given in the log, or you really mean 42 00 02?
43 was meant. (There is no 42 in my list of SCSI commands.)
> the readom source surely indicates that DVD is also meant to be read:
> but it can be buggy as well?
Nobody ever raised protest here, when i repeatedly stated in the past
that the DVD and BD capabilities of cdrkit are not state-of-the art.
I would advise dvd+rw-tools, e.g.:
dvd+rw-mediainfo /dev/cdrw
or my own programs
cdrskin -v dev=/dev/cdrw -minfo
xorriso -outdev /dev/cdrw -toc
readom will not be able to produce the Table-Of-Contents as of CD
by reading a DVD or BD:
Read speed: 7056 kB/s (CD 40x, DVD 5x).
Write speed: 1764 kB/s (CD 10x, DVD 1x).
TOC len: 81. First Session: 1 Last Session: 1.
resid: 1
01 14 00 A0 00 00 00 00 01 00 00
01 14 00 A1 00 00 00 00 01 00 00
01 14 00 A2 00 00 00 00 03 19 25
01 14 00 01 00 00 00 00 00 02 00
01 54 00 B0 05 37 25 03 4F 3B 4A
01 54 00 C0 66 00 9C 00 61 1A 41
01 54 00 C1 48 34 78 00 00 00 00
Lead out 1: 15262
MMC describes the meaning of these 7 entries as "TOC Track Descriptors".
libburn uses them to get info about tracks on CD.
Useful for learning about Table-of-Content are:
01 14 00 A0 00 00 00 00 01 00 00 -> first track number is 1
01 14 00 A1 00 00 00 00 01 00 00 -> last track number is 1
01 14 00 A2 00 00 00 00 03 19 25 -> disc ends at 3 min 25 sec 37 frames
01 14 00 01 00 00 00 00 00 02 00 -> track 1 starts at 0 min 2 sec 0 frames
The other three records are about exotic stuff which i only understand
in part.
The specs clearly state that no DVD or BD will return such raw data.
readom would have to fake them from other info.
Have a nice day :)
Thomas
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