Re: [PARPORT] HP CDWriter+ 7500, Unable to read partition table
Sat, 25 Sep 1999 09:41:17 -0400 (EDT)

> I'm trying to use a HP CDWriter+ 7500 with Linux. As you can see, the
> kernel finds the device and even starts to read the CD but this attempt
> fails.
> I already tried to mount the CDROM by hand, but it doesn't work either.
> Is the 7500 the problem or is it my brain (two cells, extend memory)
> ;-)

> <6>parport0: PC-style at 0x378 [SPP,PS2,EPP]
> <6>lp0: using parport0 (polling).
> <6>Uniform CDROM driver Revision: 2.55
> <4>paride: epat registered as protocol 0
> <4>pd: pd version 1.05, major 45, cluster 64, nice 0

First of all, I think you may be expecting something from Linux that isn't
there yet. In some Windows systems you can use an Adaptec driver to
make a CD-ROM look like a normal (but slow) read/write disk. This is
really an implementation of the "UDF" filesystem using "packet writing".

There is a UDF implementation for Linux, but it is not yet part of the
official kernel, and in particular, it is not supported by the PARIDE

BUT, even if it were supported, it would not have anything to do with
the 'pd' driver, which is for IDE devices. Most likely, UDF support will
be integrated into the "uniform CD-ROM" layer and will thus be available
through the pcd driver (indirectly via a special filesystem).

In the meantime, you can use a CD-RW as either a (read-only) CD-ROM device
using the pcd driver, or as a (write-only) CD-R burner with the pg driver
and Joerg Schilling's cdrecord program.

And, there's an added wrinkle: cdrecord has a bug that causes it to fail
with the 7500e in all but the very latest versions of 1.8.

Grant R. Guenther

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This archive was generated by hypermail 2.0b3 on Sat 25 Sep 1999 - 09:42:35 EDT