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rekrap
04-08-2001, 06:34 PM
I just installed a Miles 9100UW and an internal Quantum 10k 2 HD.
There is no terminator on the HD but it's working great!
Should I terminate it anyway?
Thanks.

MacMikester
04-08-2001, 11:09 PM
If it is the last physical device on the chain, it should be terminated. If it is not the last physical device on the chain, it should not be terminated (but something else should be). The drive has no terminator, it has an internal termination circuit which is completed by a small jumper block on the appropriate external pins of the circuit, labelled something like "TE". The Quantum website can guide you by model number.

SCSI termination is not an optional feature and you cannot trust that drive if the bus it is on is not properly terminated.

Dogstarman
04-08-2001, 11:23 PM
Don't forget to make http://www.maxtor.com your stop. The recent merger has put Maxtor's site in command of all the Quantum HD-related info. And if you are meaning that you installed a Quantum ATLAS 10K II then you will need an external terminator. It is a Low-Voltage Differential drive that has no termination circuitry on-board. All LVD drives have this feature/flaw. You can supply termination power FROM THE DRIVE TO A TERMINATOR via jumpers, but the drive itself cannot terminate a chain.

magician
04-09-2001, 12:38 PM
right.

if that is an LVD drive, you must terminate it with an external terminator on the cable at the end of the bus.

if it is a single-ended drive, then put a jumper on the TE pins, assuming it's at the end of the bus. Set TP, term power, to draw FROM the bus.

if it is an LVD drive, you should be using an LVD host like the Miles2 or the Apple/Adaptec 2940U2B. Miles2 is $200 w SoftRAID and cable/terminator. The 2940U2B is $115 with cable and terminator.

http://macgurus.com/infopop/emoticons/icon_smile.gif

MacMikester
04-09-2001, 07:21 PM
The previous couple of posts are so darn right on it makes me cry. I wish I had asked the original question, so I could besot myself with the sweet wine of new knowledge. http://macgurus.com/infopop/emoticons/icon_biggrin.gif

rekrap
04-10-2001, 03:20 PM
Thanks; the Initio card terminates itself, not the drive connected to it> I understand that now.