Adaptec 1520A User Guide - Page 42
Connecting Internal SCSI Devices
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AHA-1510A/20A Series User's Guide Connecting Internal SCSI Devices To connect an internal SCSI device to the host adapter, you need a 50-connector SCSI ribbon cable with a 50-pin internal connector. If you are attaching more than one internal device, the ribbon cable must have additional connectors. Follow these steps to connect internal SCSI devices to the internal connector on the host adapter: 1 Obtain a SCSI ribbon cable that has enough connectors to accommodate all of the internal SCSI devices. If you need to physically install the SCSI device inside your computer before attaching the cables, follow the installation instructions in the device documentation. 2 Plug the SCSI connector at one end of the ribbon cable into the host adapter's internal SCSI connector, as shown in Figure 3-6. Colored stripe SCSI ribbon cable Pin 1 Internal SCSI connector Figure 3-6. Internal SCSI Ribbon Cable to Host Adapter 3 The colored stripe on one side of the ribbon cable must match up with the number 1 printed on the host adapter board beneath the connector. This is called maintaining proper pin-1 orientation. Maintain pin-1 orientation throughout the SCSI bus, or your SCSI devices will not work properly. 4 Plug the last connector on the ribbon cable into the SCSI connector on the internal SCSI device. 3-8 AAAAAAAAAAAAAAAAAASPCAAAAAArtuHoiAAArncAAAArtkAAAe-SAAAn1NAAApt5AAAeuD1AAAcmAAA0aAAANtAbeAAAeu:/AAAr2mAAA1:0AAA15bAAAA/1eAAA1rAAA0S8:AAA4/e4AAA90rAAA94i0eAAA1-AAAs08AAAU04AAA,2AAAsR-AAAe0AAAre0'AAAvsAAA.AAAGCAAAuAAAAAAidAAAeAAAAAAAAAEAAACAAAAAANAAAAAADAAAAAAaAAAtAAAeAAA:PAAA1aAAA1AAAg/AAAe2AAA:9AAA3/AAA9-AAA48AAAAAAAAAAAAAAAAAAAA