c2scan of DVDs??
Is the c2scan as it exists for CDs also defined for DVDs? I'm trying to
debug some DVD burner / media problems , and although it works fine
for CDs, for DVDs I get an error per sector, even on new pressed DVDs.
SuSE 9.2 kernel 2.6.8, readcd 2.01. The errors are:
readcd -c2scan dev=/dev/hdb
Read speed: 1408 kB/s (CD 8x, DVD 1x).
Write speed: 0 kB/s (CD 0x, DVD 0x).
Capacity: 3931968 Blocks = 7863936 kBytes = 7679 MBytes = 8052 prMB
Sectorsize: 2048 Bytes
Copy from SCSI (0,1,0) disk to file '/dev/null'
readcd: Success. read_cd: scsi sendcmd: no error
CDB: BE 00 00 00 00 00 00 00 31 FA 00 00
status: 0x2 (CHECK CONDITION)
Sense Bytes: 70 00 05 00 00 00 00 0A 00 00 00 00 30 02 00 00
Sense Key: 0x5 Illegal Request, Segment 0
Sense Code: 0x30 Qual 0x02 (cannot read medium - incompatible format) Fru 0x0
Sense flags: Blk 0 (not valid)
cmd finished after 0.002s timeout 40s
readcd: Success. Cannot read source disk
readcd: Retrying from sector 0.
readcd: Success. Error on sector 0 not corrected. Total of 1 errors.
readcd: -noerror set, continuing ...
[and then for each block]
readcd -c2scan dev=ATA:0,1,0
readcd -c2scan dev=ATAPI:0,1,0
give the same result. No difference with a vanilla readcd 2.01.
Remembering that Jörg doesn't like current kernels with some of this
stuff, I bootet an old SuSE 8.2 kernel 2.4.20, readcd 2.0. Same errors,
with both ATAPI: access and with running the drive with ide-scsi.
Is it even theoretically possible to obtain information of how many
errors are corrected on a DVD (and therefore some indication of how good
the burn/media/etc are)?
If so, am I doing something wrong with readcd, or is there any other
Linux software to do it?
Thanks for pointers,
 Verbatim DVD-R 8x burned in a Pioneer A106 produces coasters,
truckloads of I/O errors reading in an Asus E616 dvdrom drive. Upgrading
the Pioneer's firmware from 1.05 to 1.08 only gave marginal improvement.
The Verbatim DVD-R 4x (all Verbatims up to 4x) never gave a problem
before in this burner.
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