Re: Burning a CD image slow down my connection

[Nicholas Knight]

On Tuesday 25 September 2001 03:21 am, Dr. Michael Weller wrote:
> On 25 Sep 2001, [A]ndy80 wrote:
> > I've my Plextor Writer as secondary master seen as a scsi device
> > and if I try do use hdparm it says:
> >
> > [root@piccoli shady]# hdparm -t /dev/cdrom
> > /dev/cdrom not supported by hdparm
>
> Hmm, /dev/cdrom would typically be a link. You might try to apply
> hdparm to where the link points to, but I cannot really believe
> hdparm doesn't follow links.
>
> Normally /dev/cdrom should point to /dev/hdc in your case. I somewhat
> suspect that it points to /dev/scd0. If so, can you actually
> mount the cdrom? The ide2scsi device emulation basically just passes
> scsi commands as atapi commands over the ide bus (since atapi just
> use the scsi commands but tunnel them over ide). I'm surprised this
> also works for cdroms. I wasn't aware of the fact they are ATAPI and
> thus support the scsi command set. Maybe the cdwriters are special in
> that context.

My DVD-ROM drive and Plextor PlexWriter CD-RW drive both function under 
the idescsi emulation driver. *All* current IDE CD writers are ATAPI 
and REQUIRE idescsi (or in windows, an ASPI layer) in order to be used 
as a cd writer.