Adaptec 2740A User Manual - Page 38
Terminating the Host Adapter, Terminating Other SCSI Peripheral Devices, Getting Started
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Getting Started Terminating the Host Adapter The factory installed bus terminators on the host adapter are enabled by default. Host adapter termination should be disabled only if you attach SCSI devices to both internal and external connectors, since the host adapter would then be in the middle of the SCSI bus. Enabling or disabling host adapter termination is software selectable only, and is done through your computer's EISA Configuration utility. To disable termination on the host adapter, refer to Chapter 3, Configuring the Host Adapter for instructions. Terminating Other SCSI Peripheral Devices Most SCSI devices use a jumper or a switch located close to their SCSI connector(s). On some SCSI devices, you will have to physically remove resistor module(s). Refer to the manufacturer's documentation for instructions on enabling or disabling SCSI bus termination on your SCSI peripheral device(s). Note Some drives allow for the option of supplying termination power to their resistor modules from the SCSI bus instead of from the drives power supply. This option is acceptable since the AHA-2740 Series of host adapters always supplies termination power on the SCSI bus. Adaptec AHA-2740 Series User's Manual Stock Number: 510381-00 / Rev. C (Page 2-11) Print Spec Number: 491709-00 Rev C Current Date: 9/1/93 ECN Date: 9/14/93 2-11