View Full Version : active termination
10-18-2007, 12:34 AM
I got 68pin SCSI HDD (IBM) that won't work with simple 'passive' adapter. The HDD doesn't seem to have jumper for termination.
IIRC there is a simple schematics to make it work on 50pin controller, does anyone have it?
10-18-2007, 12:43 AM
Here are the 50pin and 68pin pinouts:
10-18-2007, 03:11 AM
I couldn't get 68 pin devices to work with a 50 pin cable/terminator. I had to change the cable and terminators for 68 pin ones.
10-18-2007, 12:22 PM
I don't think the way of termination is the problem - I think using a narrow terminator with a wide drive is.
Some wide SCSI devices insist on proper termination of the full bus, so if you're just terminating the lower half (narrow), they won't work. Better get a wide terminator, an adapter with half terminator or like moto suggested, switch your cabling to wide.
U2W devices lack a termination option in general, if it's an SCA drive, you can get a terminating adapter.
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