MODE1 read-cd problem via ide-scsi

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2001-06-05
2001-06-05
  • Hi Andreas et al.,

    while using current cdrdao successfully over a series of unusual
    hardware, one simple case render my system completely busy:

    Source: data cd (MODE1)
    cdrdao read-cd --device 0,0,0 --driver generic-mmc -n toc

    reader is a TOSHIBA DVD-ROM SD-C2302    Rev: 1315
    Using driver: Generic SCSI-3/MMC - Version 1.2 (options 0x0000)
    via ide-scsi from Linux-ia32-2.4.[345] on a Toshiba Tecra 8100
    650 MHz P3 w/320 MB RAM. Resources should be sufficient ;-)

    What happens is, that quickly after lauching read-cd command,
    system load raises above 5 (0% idle, > 95% CPU time spend in
    kernel).  The command would run sccessfully, unless I kill it, which
    itself takes enough patience...

    I haven't any idea, what's going wrong. Reading cdda works
    pretty slow (factor 1.5-2), but reliable.

    BTW: grabing and burning cdda/mode1 cds works nicely via pcmcia
    firewire with an external fw case and Plextor PlexWriter 12/10/32
    'PX-W1210A' '1.07' here :-) Wanna some numbers? Just ask!

    A 12 * on the fly mode1 data copy between these devices was
    successful! (Significant load, but faily responsive system behaviour)

    I haven't fitted all pieces of this puzzle, yet. May some kind soul
    shed some light on this, please.

    Thanks in advance,
    FrisPete

    P.S.: Aborting a write command during/before the OPC causes
    some fragments to be written - bug or feature?