Adaptec USBXchange User Guide - Page 23

User's Guide: USBXchange • 23 There are various methods for terminating hard disk drives and other SCSI devices. Read the device documentation if you are not sure how to do this. Here are some general guidelines for termination: o Termination is usually controlled by installing or removing a SCSI terminator. On some SCSI devices, termination is controlled by setting a switch on the back of the device. o Most SCSI devices come from the factory with termination enabled. o Devices which use a jumper to select a source of termination power must be set to supply power to their own terminators. o Some devices require that termintaion power be supplied to the SCSI bus. The USBXchange does not supply termination power. To use these devices with the USBXchange, another device (which supplies termination power) must be added to the SCSI bus. An external SCSI terminator may be required in certain SCSI chains. (Actual appearance may vary) Connecting to More Than One SCSI Device You can use the USBXchange to connect your computer to either one SCSI device, or several SCSI devices in a series (in a SCSI chain) up to seven devices. If the SCSI connector on your USBXchange is not appropriate to use in your system configuration, you may need to obtain an adapter to properly connect the USBXchange to your SCSI device(s). You may also need additional SCSI cables if you connect more than one SCSI device to your USBXchange. Some of your existing SCSI devices may have already included SCSI cables which may be appropriate to use. It is important to use high-quality cables to ensure that data is read and written correctly. Adaptec provides high-quality SCSI cables designed specifically for use with the USBXchange.