Adaptec 2020SA User Guide - Page 150
Setting SCSI IDs, Changing SCSI Termination on the Controller, Enabling CD Drive Support
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About SCSI See Mixing SE Devices with LVD Devices on page F-3 for more details. Setting SCSI IDs For each controller channel, the SCSI IDs of the devices must be unique numbers between 0 and 15. The controller, itself a SCSI device, is usually set to ID 7 by default. SE drives usually support IDs between 0 and 6. SCSI enclosures that use SCSI drives with 80-pin SCA connectors typically assign the drive ID automatically when the drive is inserted. You don't need to set device IDs with such enclosures unless your enclosure requires it. For details, refer to the enclosure User's Guide. The RAID controller ID can be changed to any ID from 0 through 7 using the ARC utility. Note: Do not change the controller ID unless the change is absolutely necessary. Changing SCSI Termination on the Controller The default termination for the controller is Auto Mode and you will probably never need to change this setting. However, if you do need to change the termination, you can use the SCSISelect Controller SCSI Channel Termination option to change the setting to Disabled. For details, see page A-12. All these SCSI controllers support multimode SCSI termination. Enabling CD Drive Support Note: Adaptec SCSI RAID controllers do not support CD drives in Linux systems. If you attached a CD drive to the controller, you need to configure the controller BIOS as follows to make the CD drive work: 1 While the system is starting, press Ctrl-A when the controller displays its message on the screen. F-2