Uzi,

If I understand you correctly, the CD's only work properly if they are alone,
they don't work together.

What kind of mobo do you have? Does it have an Intel chipset? If so, do you
have Bus Masters installed?

Jose



Uzi Paz wrote:

> A strange thing.
>
> I have an external SCSI CD-R (Panasonic CW-7502B) which is connected to an
> Adaptec 2940AU SCSI controller.
>
> I also have an internal CD-ROM (Panasonic CR-588B)
>
> * If I physically connected the CD-R and SCSI card but the CD-ROM is
>   disconnected: the CD-R will be recognized correctly and will work fine.
>   (Both on DOS and on Win95)
>
> * If I disconnect the SCSI controller (and thus the CD-R) but connect the
>   CD-ROM, the CD-ROM will be recognized correctly and will work without
>   problems. (both on DOS and on Win95)
>
> * If I connect the SCSI adapter (PCI), and the CD-ROM (to the IDE2)
>   I will get a letter for the CD-ROM and if I try to access the CD-ROM it
>   will work but I shall always get that the CD-ROM drive does not have a
>   valid media. Also when looking at the drivers, the driver is claimed to
>   be loaded but to be attached to any drive. On DOS the drive letter will
>   not be assigned.
>
> * If I will also connect the CD-R, it will not be recognized by Win95 or
>   DOS, and no assigned letter, the CD-ROM as before will have an assigned
>   letter, but will not be assigned to the correct loaded Driver, and will
>   claim an empty drive. (The driver is loaded but claim that there is no
>   physical drive attached to it, or that it is an incorrect driver
>   (although it works fine if the SCSI controller is disconnected).
>
> * In all cases the PnP BIOS recognizes the SCSI adapter, the CD-R and
>   the CD-ROM (when connected) correctly.
>
> Any ideas?
>
> Thanks,
>
> Uzi

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