Adaptec 1520A User Guide - Page 39
Setting SCSI IDs, Inserting the Host Adapter in a Slot
![]() |
View all Adaptec 1520A manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 39 highlights
Hardware Installation Setting SCSI IDs Each device on the SCSI bus, including the host adapter, must have a unique SCSI ID. The ID uniquely define each device on the SCSI bus and determine which device controls the bus when two or more devices try to use it at the same time. ID 7 has the highest priority, and ID 0 has the lowest. Setting SCSI IDs is a two-step process: 1 Determine the ID of each device on the SCSI bus. The default ID for the AHA-1510A/20A is ID 7. To determine the IDs of disk drives, CD-ROM drives, and other devices, read their documentation and examine their switch settings or jumper settings. 2 Change the IDs (if needed) so that no IDs are duplicated on the same host adapter. We recommend the following IDs: - Leave the AHA-1510A/20A at the default, SCSI ID 7. - If you are installing Floptical drives, set them to SCSI IDs 2 through 6. - If you want to boot your computer from a SCSI hard disk drive, set the drive ID to 0. See the SCSI device documentation for instructions on changing the SCSI ID. Inserting the Host Adapter in a Slot WARNING: Be sure the power is turned OFF before you continue. Also, ground yourself by touching an unpainted surface on the computer chassis before you open the computer case. 1 Remove the cover from the computer case. 2 Locate an unused, unobstructed expansion slot. 3 Remove the corresponding expansion slot cover from the back of the computer chassis. (The slot cover is the metal strip that covers the opening through which the host adapter's external connector extends.) Keep the screw that held the metal strip in place; you will need it later. 3-5 AAAAAAAAAAAAAAAAAASPCAAAAAArtuHoiAAArncAAAArtkAAAe-SAAAn1NAAApt5AAAeuD1AAAcmAAA0aAAANtAbeAAAeu:/AAAr2mAAA1:0AAA15bAAAA/1eAAA1rAAA0S8:AAA4/e4AAA90rAAA94i0eAAA1-AAAs08AAAU04AAA,2AAAsR-AAAe0AAAre0'AAAvsAAA.AAAGCAAAuAAAAAAidAAAeAAAAAAAAAEAAACAAAAAANAAAAAADAAAAAAaAAAtAAAeAAA:PAAA1aAAA1AAAg/AAAe2AAA:9AAA3/AAA9-AAA45AAAAAAAAAAAAAAAAAAAA
![](/manual_guide/products/adaptec-1520a-user-guide-12cfd30/39.png)