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Re: Problems mounting cdrom

Stephen Powell <zlinuxman@wowway.com> writes:

> On Thu, 02 Sep 2010 16:38:31 -0400 (EDT), Rodolfo Medina wrote:
>> I just removed from the case of my PC two old cdrom/dvd devices that were
>> broken.  Then I set all the cables as I could but I'm no expert and don't
>> know if I did everything ok.  Anyway, all seems ok except that I can't mount
>> the cdrom device that is now in my system.
>> In fstab I have:
>> /dev/hdc         /media/cdrom0   udf,iso9660 user,noauto     0       0
>> and, when I do `mount /cdrom', the system complains that the `special device
>> hdc does not exist'.  In fact, there's only /dev/hda.
>> The device is seen by the system: I can regularly eject.  Besides, at start
>> it is seen properly as a Maxtor device, in `primary master' position.
>> What can I do?
>> In fstab I replaced hdc with hda, but then the system complains that `hda is
>> already mounted or /media/cdrm0 busy'.
> What about your hard disk partitions?  What are they called?
> I'm going to make some guesses, since you don't provide the information.
> I'm going to assume that you are running Lenny, and that your computer
> has a single hard disk, which is IDE, and that it is /dev/hda.
> Your hard disk partitions are called /dev/hda1, /dev/hda2, etc.
> And I'm also going to guess that the CD ROM drive is also IDE.
> There are two possibilities here: (1) Your CD ROM is "daisy chained"
> to the hard disk.  That is, a single cable goes to both the hard
> disk and the CD-ROM drive.  If that is the case, the hard disk
> should be "primary master" and the the CD ROM drive should be set
> for "primary slave".  Check the jumpers on the drive to make
> sure it is set for slave operation.  In this case, it might be
> /dev/hdb.  (2) Your CD ROM has a separate cable, it which case
> it is probably connected to the secondary IDE controller.
> It should then be be set for "secondary master".  Check the jumpers
> on the CD-ROM drive and make sure it is set for master operation.
> It would be very unusual for a CD-ROM drive to be a primary master.
> That position is almost always reserved for the hard disk.
> Check your hard disk.  Is it a Maxtor drive?  If this is the case,
> I think the system is seeing your hard disk and not your CD-ROM
> drive.
> It is common practice for corporate IT departments to disable
> a CD-ROM drive by removing the jumper, so that it is neither set
> for master (MA) nor slave (SL) operation.  Sometimes they will set it for
> cable select (CS) or sometimes they will remove the jumper entirely.
> They do this to try to prevent users from installing software
> or to keep them from burning CDs.  That may be what is
> wrong with the drives you removed, too.

I think you're right: Maxtor is the hard drive.  I think the cdrom has a
separate cable.  The problem is that I don't manage to organize the cables the
right way.  Is there on line some pictures where I can learn how to properly
set them?


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