Easy question about ext scsi cable @ buy.com

[Finality]

Anyone know what scsi cable is available at buy.coms site that connects a Tekram DC-390U2W to an external zip drive?

I misordered twice before because the csr assured me it was the right cable

A link to that page where the cable is located is appreciated

 

[Finality]

^

come on boys I need to place my order asap

 

[obenton]

Good place to get cables is www.cyberguys.com - call them, tell them what you're trying to connect.

 

[Floyd]

Can you tell me what kind of connector the Zip drive uses (# pins)? I don't own one, but if memory serves, it uses a DB25. Your DC-390U2W has both an HD68 external connector on the card itself and an HD50 on the supplemental slot adapter. You should use the HD50 adapter to interface to the Zip (to preserve the bandwidth of the remaining HD68). So your cable needs an HD50 on one end and DB25 on the other. Double check that the DB25's on the Zip are indeed female, which is standard. Iomega might have pulled a jack move and put a male DB25 on the Zip, presumably to sell replacement cables at ridiculous prices.

Adaptec cable at buy.com

Best regards,
Floyd

 

[Finality]

The card itself has a 68 pin adapter. It is larger than the normal 68 pin adapter that are found in most scsi systems.

It is a 68 pin EXTERNAL Tekram 390U2W not the normal sized internal connector. You are right it is a female connector (I got the drive more than a year ago).

Also from what I understand preserving the bandwidth is false. The devices do run independantly of one another. ie the scsi zip running at 10MB/sec will not effect my drives running at 80MB/sec. Unless I read wrong?

 

[Floyd]

"The card itself has a 68 pin adapter."

Yes, but you should also have received a slot adapter (item 3 shown here) with an HD50 which may be connected to Point 2 on the photo. You should use this connector to attach your [slower] Zip drive, rather than use the ext 68 pin on the card. More on this below.

"It is larger than the normal 68 pin adapter that are found in most scsi systems."

Larger than an HD50 perhaps, but all 68-pin connectors are this size.

"Also from what I understand preserving the bandwidth is false. The devices do run independantly of one another. ie the scsi zip running at 10MB/sec will not effect my drives running at 80MB/sec. Unless I read wrong?"

The DC-390U2W has two independent channels...connectors 3 & 7 from the photo form the first channel which is Ultra2 (80MB/sec max), whereas connectors 1 & 2 form the second channel which is Ultra/Wide (40MB/sec max). The fact that it has two independent channels allows you to mix LVD and SE devices on the card and preserve their max bandwidth, but not on the same channel. So it is best to keep your faster LVD Ultra2 devices on the first channel and the slower SE Fast/Wide devices on channel two.

Quote from the DC-390U2W manual:
"When any SE device is connected on the Ultra2 connector(s), all the LVD devices on the connector(s) will be down-graded to SE performance."

Best regards,
Floyd

 

[Finality]

Thanks for the help Floyd