Any g(n)uru's here? (NCR53c875J + Plextor PX-R412C problem)

Any g(n)uru's here? (NCR53c875J + Plextor PX-R412C problem)

Post by Daniel Horchne » Wed, 21 Jul 1999 04:00:00

I am new to Linux and am currently trying to configure Linux on my PC.

My problem: I can't access my Plextor CDR under Linux 2.2.5.
I have a SCSI card with the NCR53c875J chipset which is detected by
Linux at startup. It should be possible to use the Plextor PX-R412C
under Linux, because XCD-Roast lists the PX-R412C as one of the
supported CD writers.

My question: Is there anybody here who is able / knows how to use the
PX-R412C under Linux? If so, how can I get it to work? I can use the
PX-R412C under Windows 98 without any problems, but I want to leave
Win98 for 100% and not need it for anything.

This is what Linux says about my SCSI card (which is all correct):
  ncr53c8xx: at PCI bus 0, device 11, function 0
  ncr53c8xx: 53c875J detected with Symbios NVRAM
  ncr53c875J-0: rev=0x04, base=0xe8001000, io_port=0xe400, irq=9
  ncr53c875J-0: Symbios format NVRAM, ID 7, Fast-20, Parity Checking
  ncr53c875J-0: on-chip RAM at 0xe8000000
  ncr53c875J-0: restart (scsi reset).
  ncr53c875J-0: Downloading SCSI SCRIPTS.
  scsi0 : ncr53c8xx - revision 3.1h
  scsi : 1 host.

Firstly, /dev/scd0 does exist (11, 0). SCSI support is compiled into the
kernel, however a "cat /proc/devices" doesn't show any SCSI devices. I
have problems with the Linux kernel that comes with Red Hat Linux 5.2
(2.0.34) as well as the one that comes with Red Hat 6.0 (2.2.5). I have
compiled kernel 2.0.34, 2.0.36 and 2.2.5 myself (to be sure of SCSI
support) without any change.

I tried the following:
  mount -t iso9660 /dev/scd0 /mnt/cdrom -o ro
with a response of:
  mount: the kernel does not recognize /dev/scd0 as a block device
         (maybe `insmod driver'?)

I also tried:
  dd if=/dev/scd0 of=/dev/null bs=2048
which not surprisingly says:
  dd: /dev/scd0: No such device

I also tried to set the "block" jumper on the back of the PX-R412C
without any change.
I read the SCSI-HOWTO, the CDROM-HOWTO, the CDR-HOWTO and the
Sigh, anybody out there who can help me?

Many thanks in advance,
Daniel Horchner