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Old 01-23-2003, 09:14 PM
spiritG spiritG is offline
Join Date: Oct 2002
Posts: 181
Default ATTO Internal Scsi Connector to External Drive

I need to transfer some files from SCSI drives onto a quicksilver dual gig. There is a ATTO UL2D SCSI card installed. It has a HDSCI external jack (for which I have no connector or cable) and an internal 68pin- for which I have a 68pin to 50 centronics adaptor cable.
The computer freezes on start up with a blank screen when a drive is connected.
Before I spend hours troubleshooting,

I thought I'd ask if using the "internal" connector to a drive in an external case poses inherent problems (via the 60pin to centronics). I've tried with a passive 50pin SCSI terminator, and without one.

Or is it the 68 pin to Centronics that could be a problem? The computer boots up fine with the card and adaptor cable connected, but not with a drive connected.

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Old 01-23-2003, 09:18 PM
Nick Batzdorf Nick Batzdorf is offline
Join Date: Jan 1999
Location: Sherman Oaks, CA USA
Posts: 665
Default Re: ATTO Internal Scsi Connector to External Drive

You mean you have the computer case and hard drive box open so you can connect the internal bus to the drive? There's nothing wrong with that.

It may be that your 68->50-pin adapter isn't kosher. Something about high bit termination...it's been too long for me to remember, but I do remember that being an issue.
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Old 01-24-2003, 06:02 AM
Bushpig Bushpig is offline
Join Date: Aug 1999
Location: UK
Posts: 644
Default Re: ATTO Internal Scsi Connector to External Drive

Spirit G,

I have had to deal with a similar problem and the only way I got around it was to buy a properly terminated 68 pin - 50 pin SCSI cable and hook it to the EXTERNAL port on the SCSI card. I don't remember much about the exact technical details either, but I know that I first bought a 68-50 cable that didn't work and then investigated the issue with my local PT/Drive supplier who then sold me the right lead with the qualities Nick described. Definitely to do with the cable correctly terminating the extra unused lines, which is necessary when converting wide SCSI to narrow as is the case in your situation.

I hope this helps

Steve Bush
2 x Systems: MacPro 5.1 (Nehalem) 2 x 2.26 Quad Core, OSX 10.9.5 (Mavericks), PT10.3.10HD, 32 Gig RAM, PCIe HD3, 192's, Sync I/O, Midi I/O.
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Old 01-24-2003, 02:05 PM
Mark Haliday Mark Haliday is offline
Join Date: Feb 2001
Location: Paris, France
Posts: 770
Default Re: ATTO Internal Scsi Connector to External Drive

try these links


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Old 01-25-2003, 12:31 AM
georgia georgia is offline
Join Date: Aug 1999
Location: NY,NY
Posts: 1,859
Default Re: ATTO Internal Scsi Connector to External Drive

With the ATTO cards, you can use the external OR the internal connection at any one time. but not both.
If you have a dual channel atto card you can use 1 channel for internal and 1 for external...but again, you can only use one of the connections on each channel at anyone time.


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