Re: CD-ROM + Modem = errrr...
Jens Axboe (axboe@image.dk)
Thu, 15 Jul 1999 22:43:59 +0200
On Thu, Jul 15 1999, Thierry Vignaud wrote:
> > Jens, I have the problem that:
> >
> > stat("/dev/hdc", {st_mode=S_IFIFO|S_ISGID|S_ISVTX, st_size=0, ...}) = 0
> > open("/dev/hdc", O_RDONLY) = -1 ERRNO_123 (No medium found)
> >
> > So that my boot script to change parameters does not work. hdparm is
> > release 3.5. kernel 2.2.10. RH 6.0. I have to put a cdrom to let the
> > driver accept -u 1.
> >
> > Am I doing something wrong?
>
> It means there is no cd in the cdrom drive. But if you type hdparm
> /dev/cdrom, it should display something like:
> /dev/cdrom:
> HDIO_GET_MULTCOUNT failed: Paramètre invalide
> I/O support = 0 (default 16-bit)
> unmaskirq = 1 (on)
> using_dma = 0 (off)
> keepsettings = 0 (off)
> HDIO_GET_NOWERR failed: Paramètre invalide
> readonly = 1 (on)
> readahead = 8 (on)
> HDIO_GETGEO failed: Paramètre invalide
>
> The important line is "unmaskirq = 1 (on)" which said your command
> has succeed. The errors came from that a cd does not behave like a hard
> disk (it's not always present, it's read-only, it does'n support the
> full eide commands but a subset named atapi , ...)
>
> So you have not doing something wrong.
> Just don't check the hdparm result in your script or do a hdparm -qu
> /dev/cdrom
On most drives the open() will fail and hdparm will then quit. Then
the settings will not get updated.
> --
> MandrakeSoft http://www.mandrakesoft.com/
> --Thierry
--
* Jens Axboe <axboe@image.dk>
* Linux CD-ROM Maintainer
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/