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| converter from SCSI 68 pins to 50 pins |
Posted by: meall on 2016-04-23 07:56:08
Is it something possible to do? I have a few large HDD in an enclosure that should in theory work, but they have the wrong type of SCSI connector on them. If I could find a adapter that could bring them usable in my G3 Beige, that would be great.
Thank you
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Posted by: 360alaska on 2016-04-23 08:26:10
Yes, there are plenty of these adapters on Ebay but very few have the terminator built in so you'll need one of the 68-pin cables that has a terminator at the end. You can also terminate it on the 50-pin side with a cable like this in your mac: http://www.ebay.com/itm/190158-008-Compaq-Narrow-SCSI-50-pin-3-Device-Cable-with-Terminator-/271910662444?hash=item3f4f23712c:g:bngAAOSwMmBViaab
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Posted by: uniserver on 2016-04-23 08:26:48
http://www.ebay.com/itm/Convert-SCA-80-Female-to-SCSI-HD-50-68-Female-Pin-Male-Adapter-SCSI-Devices-/181861927076?hash=item2a57d0c8a4:g:wV4AAOSwFnFV7otL
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Posted by: uniserver on 2016-04-23 08:29:11
http://www.ebay.com/itm/50pin-wire-Internal-Male-Plug-cable-cord-Terminator-SCSI1-2-HD-HDD-CD-CDRW-drive-/291730111738?hash=item43ec783cfa:g:9vIAAOxyTjNSo3fZ
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Posted by: meall on 2016-04-23 10:15:01
I'm all trying to figure out how to connect all of this links together!
The HDD have female connectors. The adaptor you provided Uniserver, I thing it has female on one side and male on the other, is that correct?
Does it has a SCSI termination included or not? that black portion on the top of the adaptor looks like it is for something useful, but I cannot guess what. Or it is the reverse side of the male port on the other side only.
I have a 68 pins SCSI terminator on the enclosure, I wonder if that could be used on the male connector on the adaptor itself.
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Posted by: meall on 2016-04-23 10:18:21
Oh, another fact, I have a PCI Adaptec SCSI card that came with that Beige when I got it (AHA-2940W/2940UW) but it does not look like the beige can boot from it. When I booted with Mac OS 8.5, it was not even detected, no disks mounted.
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Posted by: 360alaska on 2016-04-23 16:16:43
use this guy:http://www.ebay.com/itm/Internal-HD68-HPD68-SCSI3-To-50-Pin-Converter-Adapter-New-/252352998645?hash=item3ac1692cf5:g😀nwAAOSwX~dWjr4K
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Posted by: meall on 2016-04-23 16:28:53
Does that one provides the termination as well?
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Posted by: 360alaska on 2016-04-23 20:22:09
I'm not sure, it does say "active" on it, that could mean that it has active termination...
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Posted by: johnklos on 2016-04-23 23:36:50
If the controller is 68 pin, you need termination on the upper 8 bits of the bus. If the controller is 8 bit, then so long as termination on one end is 16 bits and SE, then 8 bit termination on the other end will be sufficient to allow narrow negotiation.
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Posted by: meall on 2016-04-24 05:37:05
Obviously, on the Beige G3, the controller should be 8 bits.
So if I do understand you well, that means I should not need to worry at all about the termination on the other side. Is that right?
I was thinking about it, and told myself, if I install any 50 pins SCSI HDD, I never had to worry about this.Â
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