hp fast wide --> ultra fast wide

hp fast wide --> ultra fast wide

Post by Scott K » Mon, 09 Mar 1998 04:00:00



Excluding controller cards, is there an adaptor, or cable I can use to
connect a fast wide, external drive to a hp C200?  The C200 has a Ultra
fast wide interface.

Strange, the cable interface is exactly the same for the 2.

Thanks in advance,
Scott

 
 
 

hp fast wide --> ultra fast wide

Post by Maik Bachman » Tue, 17 Mar 1998 04:00:00



> Excluding controller cards, is there an adaptor, or cable I can use to
> connect a fast wide, external drive to a hp C200?  The C200 has a Ultra
> fast wide interface.

> Strange, the cable interface is exactly the same for the 2.

Not strange -  the connectors for 16bit ( wide ) SCSI2 and Ultra  are
the same 68 pin ones ( even with single ended and differential ) - BUT
you should use higher cabling quality and be careful with cable length
restrictions.
So, take a 68 pin connector and plug onto HP.

---Maik

Quote:

> Thanks in advance,
> Scott

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hp fast wide --> ultra fast wide

Post by Anthony W. Youngma » Thu, 19 Mar 1998 04:00:00





>> Excluding controller cards, is there an adaptor, or cable I can use to
>> connect a fast wide, external drive to a hp C200?  The C200 has a Ultra
>> fast wide interface.

>> Strange, the cable interface is exactly the same for the 2.

>Not strange -  the connectors for 16bit ( wide ) SCSI2 and Ultra  are
>the same 68 pin ones ( even with single ended and differential ) - BUT
>you should use higher cabling quality and be careful with cable length
>restrictions.
>So, take a 68 pin connector and plug onto HP.

AFAIK you can plug *any* SCSI drive into *any* SCSI controller (provided
you've got the right adaptor).

We have several machines with fast scsi controllers, and when we bought
some big drives we bought fast wide drives (our supplier assured us
there would be no problem :-). We then did have horrendous trouble, but
one of the nice things about UK law is that sales-people are obliged to
stand by their word. Having EXPLICITLY stated that we wanted to plug a
fast-wide drive into a fast controller if possible, we let the supplier
sort out the mess after they had assured us it was possible. They tried
to sell us a fast-wide controller for about 300GBP (it was COMPAQ, after
all) and we said "no we've got a controller already, we don't want
another".

Finally they put us onto a specialist cable/connector supplier who sold
us some connectors for about 30GBP that convert between standard and
wide format. Good value, we thought. We are now about to buy some
machines with inbuild fast-wide controllers and the drives will be moved
across (which is why we wanted that interface in the first place, COMPAQ
charging the same price for a SCSI disk, irrespective of the drive
interface).
--
Anthony W. Youngman - wol at thewolery dot demon dot co dot uk
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to a doughnut. These sugarcoated trousers have yet to catch on at fast-food
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hp fast wide --> ultra fast wide

Post by Matthew Byng-Maddi » Mon, 23 Mar 1998 04:00:00







>>> Excluding controller cards, is there an adaptor, or cable I can use to
>>> connect a fast wide, external drive to a hp C200?  The C200 has a Ultra
>>> fast wide interface.

>>> Strange, the cable interface is exactly the same for the 2.

>>Not strange -  the connectors for 16bit ( wide ) SCSI2 and Ultra  are
>>the same 68 pin ones ( even with single ended and differential ) - BUT
>>you should use higher cabling quality and be careful with cable length
>>restrictions.
>>So, take a 68 pin connector and plug onto HP.

> AFAIK you can plug *any* SCSI drive into *any* SCSI controller (provided
> you've got the right adaptor).

I think that more to the point, the standards are all backwards compatible,
and will perform negotiation, so that as long as the controller is a better
standard than the device, the system will work.  It may work the other way
round, but SCSI-I controller's won't know how to do Ultra-Wide, or even Wide
Negotiation.

MBM

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