Adaptec 19160 - SCSI Card Storage Controller U160 160 MBps Reference page 10

Adaptec SCSI Card 19160 User's Reference
Termination on external SCSI devices usually is controlled by
installing or removing a SCSI terminator. However, termina-
tion on some external devices is enabled or disabled by setting
a switch on the back of the SCSI device.
Some devices use automatic termination. Be sure to check the
documentation for the device to be certain that the device is
correctly terminated.
By default, termination on the Adaptec SCSI Card 19160 itself
is set to Automatic (the preferred method). We recommend that
you do not change this default setting.
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