Follow up.
What I did, when I needed to put modern UW SCA drive on narrow bus was:
1. Installed this type of Narrow to Wide adapter directly on motherboard
2. Installed this type of SCA to UW adapter on the drive.
3. Replaced Narrow cabling with Ultra Wide one and used cable that had UW terminator at one end.
In that way, Ultra Wide drive had all signal lines properly terminated.
If the cable is too long / has too many connectors, it couldt be cut off near the last connector with very sharp knife
Flat, Ultra 2 cables (yellow) work best with older SCSI chips, I had problems with Ultra 160/320 twisted pair LWD terminated cables on some occasions. Don't ask me why, I don't know. (Impedance? Different termination circuitry?)
What I did, when I needed to put modern UW SCA drive on narrow bus was:
1. Installed this type of Narrow to Wide adapter directly on motherboard
2. Installed this type of SCA to UW adapter on the drive.
3. Replaced Narrow cabling with Ultra Wide one and used cable that had UW terminator at one end.
In that way, Ultra Wide drive had all signal lines properly terminated.
If the cable is too long / has too many connectors, it couldt be cut off near the last connector with very sharp knife
Flat, Ultra 2 cables (yellow) work best with older SCSI chips, I had problems with Ultra 160/320 twisted pair LWD terminated cables on some occasions. Don't ask me why, I don't know. (Impedance? Different termination circuitry?)