Adaptec 2930U User Manual

Contents

A-2Understanding SCSISCSI IDsSCSI IDs identify each device on the SCSI bus and determinepriority when two or more devices are trying to use the SCSI bus atthe same time. The SCSI card is also identified by a SCSI ID. For theSCSI Card 2930CU, SCSI IDs are numbers between 0 and 7.Adaptec presets the SCSI Card 2930CU to SCSI ID 7. You shouldnot change this setting. SCSI ID 7 has the highest priority on theSCSI bus; the remaining SCSI IDs descend in priority from 6 to 0.Use SCSI ID 0 for the first SCSI hard disk drive. Most internal SCSIhard disk drives come from the factory set to SCSI ID 0.Note: If you are booting your computer from a SCSI hard diskconnected to the SCSI Card 2930CU, the Boot SCSI ID settingin the SCSISelect utility must correspond to the SCSI ID of theperipheral you are booting from. By default, the Boot SCSI IDis set to 0. See Boot Device Options on page B-4 to change theBoot SCSI ID.Here is some general information about SCSI IDs: For internal SCSI devices, you generally set the SCSI ID byconfiguring a jumper on the SCSI device. For external SCSI devices, you generally set the SCSI ID with aswitch on the back of the device. For specific instructions on setting the SCSI ID, refer to the SCSIdevice’s documentation. In Windows 95/98, you can use the Device Manager to view theSCSI ID assigned to the SCSI card and each SCSI device.SCAM ProtocolThe SCSI Card 2930CU supports the SCSI ConfiguredAutoMatically (SCAM) protocol. This protocol assigns SCSI IDsdynamically and resolves SCSI ID conflicts automatically whenyou start the computer. If your computer includes SCSI disk drivesor other SCSI devices that support SCAM, you do not need toassign SCSI IDs manually to these devices.