Based on your questions, it sounds like you are pretty new to SCSI. May I
suggest that you read the Linux SCSI-HOWTO? The URL is:
ftp://sunsite.unc.edu/pub/Linux/docs/HOWTO/unmaintained/SCSI-HOWTO
On Tue, 22 Dec 1998, Rasana Atreya wrote:
> Here are the three SCSI adapters I am considering (in the order of preference):
> - Tekram DC-390F based on Symbios Logic 53C875 chip.
>
> It has SCSI-2, Ultra-SCSI, Wide-SCSI, Ultra-Wide SCSI (1 50-Pin SCSI-2
> Internal, 1 68-Pin Wide SCSI Internal, 1 68-Pin Wide SCSI External.
>
> -----------
> Here are my questions:
>
> - If I buy say an Ultra CDROM drive, a SCSI-2 Zip drive, and an Ultra hard disk
> is the Tekram a good choice?
There is no problem. Keep in mind, however, that with this particular
model you will only be able to use 2 of the 3 connectors on the card.
> Since the Tekram does not have an external 50-pin connector, would I be
> able to use the ZIP drive with a 168-pin to 50-pin adapter?
I assume the "168" was actaully "68". Yes, that's perfectly fine, and
actually quite common.
> - Is is acceptable to mix and match SCSI-2 and Ultra SCSI?
Yup.
> - Does the floppy drive have to be SCSI?
Not at all. Floppy drives typically use their own floppy controller. Some
of the new Super drives (120 LPS and 200MB HiFD) use EIDE, parallel ports,
and I imaginein some cass SCSI, but in general, such a beast is quite
rare. Given the performance characteristics of a typical floppy drive
(dog slow), there'd really be nothing to gain by hooking it up to a SCSI
controller.
> - Can internal devices be daisey-chained?
Yes. It's slightly different on the inside, however. External devices
usually use one cable per device, with each additional device cabled to
the previous device. Internal devices use one cable with multiple
connectors on it. So, when you buy your internal SCSI cable, keep in mind
how many devices you'll be connecting, and how many more you might want to
connect in the future.
--Chris
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