Cdrdao: which driver for LiteOn 52327S?

Hi folks,

I hope this is the right forum for my question.

I burn CDs with the LiteOn 52327S and the software k3b which uses Cdrdao to read music CDs.
http://cdrdao.sourceforge.net/drives.html is a list of fitting drivers for different drives, but it doesn’t contain my drive :frowning:

So I tried generic-mmc and generic-mmc-raw, both worked, but which is best?

Some more informations:
I saved 2 image files per driver. All 4 files exactly have the same size (about 460 mb) and my drive needed same time to do it.

Then I compared the files byte for byte with cmp. Results:
generic_mmc_1 - generic_mmc_2: 3439 bytes different
generic-mmc_1 - raw_1: 3914 bytes different
generic-mmc_1 - raw_2: 2731 bytes different
raw_1 - raw_2: 3641 bytes different

So I guess, it doesn’t matter much, which driver I use, but perhaps someone has an answer like “if raw works it’s always best driver” …

Thanks!

Hi, it’s allways funny to see Linux users here too :). I have the 7S drive too, and I’m using k3b, cdrdao and xcdroast (in fact, cdrdao and cdrecord). The question “whitch driver is better?” has no easy answer, so I think the best is to put the information I have about the two drivers and my final conclusion.

generic-mmc
This is a driver for SCSI-3/mmc compatible CD-recorders that support
session-at-once (cue sheet based) writing. Most of the recent drives
(ATAPI, SCSI, USB, Parallel Port) should be compatible with this or
with the ‘generic-mmc-raw’ driver described below. Data track writing
support is also available.
‘read-toc’ scans linearly the Q sub-channel of each track to retrieve
the pre-gap length and index marks. This method is very accurate but
takes the same time like digital audio extraction. It should also work
with recent CD-ROM readers.

 Option Bits:
    read-toc/read-cd related:
       0x00000001: Read 16 bytes PQ sub-channel instead of 96 byte
                   raw P-W sub-channel data. If 'read-toc'/'read-cd'
                   fails on your drive try to select this option.

       0x00000002: Only used if option '0x00000001' is selected. If set
                   the read PQ sub-channel data is expected to contain
                   BCD instead of HEX values. If the time count that
                   is displayed while running 'read-toc' jumps you will
                   have to toggle this option.

       0x00000004: Do not take ISRC code from the sub-channel data but use
                   the appropriate SCSI command for reading the ISRC
                   code. This option is automatically selected if 16
                   byte PQ sub-channel data with HEX values is used.
       0x00000008: Try to retrieve the media catalog number by scanning
                   the sub-channels instead of using the appropriate
                   SCSI command. This might be an option if the CD-R/CD-ROM
                   drive does not extract the catalog number otherwise.

                   Note: A media catalog number need not be present on
                         on a CD.

       0x00000020: Use this option if the drive cannot read sub-channel
                   data along with audio data. A binary search method for
                   pre-gap and index mark extraction will be selected in
                   this case which has to play a sector before the
                   sub-channel data can be retrieved.
                   If 'read-toc'/'read-cd' works only with this option
                   you should consider to use '--fast-toc' since the
                   data retrieved with the binary search method is usually
                   not very reliable and not worth the additional time.

       0x00000100: Force using the raw R-W sub-channel reading mode for audio
                   and data tracks.

    writing related:
       0x00000010: Enable CD-TEXT writing. This must be done explicitly
                   because there is no way to detect if a recorder supports
                   CD-TEXT writing. Trying to write CD-TEXT data with
                   recorders that do not support this feature usually
                   results in an error message at the beginning of the
                   recording process and in real write mode the medium
                   will be unusable.

       0x00000040: Suppresses the activation of the BURN Proof feature.

       0x00000080: If the drive does not support packed R-W sub-channel writing
                   (the drive does not support the L-EC data creation and
                   interleaving for R-W sub-channel data) you will have to
                   specify this option. Cdrdao will perform all the encoding
                   and write in raw R-W mode. If the drive does not support the
                   raw R-W writing mode, too, it is not possible to write
                   sub-channel data.

generic-mmc-raw
This is an alternate driver for SCSI-3/mmc compatible CD-recorders.
It uses the raw writing interface where the driver has to provide the
PQ sub-channel data in addition to the audio data. This writing mode
allows using part of the lead-out area for audio data since the drive’s
firmware has no chance to prevent this. Of course, you will get some
error message at the end of writing when the CD-R capacity is exhausted.
Multi session recording is currently not supported.
CD structure analysis is done like in the ‘generic-mmc’ driver.

 Option Bits:
    All of 'generic-mmc' except

       0x00000010: CD-TEXT writing capability is automatically determined.

       0x00000080: R-W sub-channel writing capability is automatically determined.

Final conclusion

If you are going to record audio or data to backup something, use the generic-mmc driver, to 1:1 use generic-mmc-raw.