2-3installing your controllerWide devices allow data to be transferred at twice the rate ofNarrow devices. The Wide bus is backward compatible withNarrow devices, allowing both types of SCSI devices to be usedwith the same controller. The Narrow interface is still used withsome SCSI devices, such as tape and CD drives.LVD and SE devicesAttaching a single-ended (SE) SCSI device to an LVD bus causesthe bus to slow down to Ultra SCSI speed (20 MHz) for alldevices.Note: Adaptec RAID controllers cannot be used with olderSCSI 5-V differential (DE) devices.SCSI cablesAdaptec recommends you using Ultra160 SCSI devices and goodquality LVD SCSI cables, which can be purchased from Adaptec,at www.adaptec.com , or other suppliers.SCSI device IDsThe SCSI specification allows up to 7 SCSI devices (and acontroller) to be connected to a single 8-bit SCSI bus. A WideSCSI bus can support up to 15 devices and the controller.All SCSI devices, including the controller, must be assigned aunique SCSI ID. SCSI IDs, which are typically set using jumpersor switches on peripheral devices, can be assigned any numberfrom 0 to 7 for 8-bit SCSI devices or 0 to 15 for Wide SCSIdevices.Set the SCSI ID of each SCSI device attached to the controller toa unique ID number between 0 and 6. The Adaptec RAIDcontroller is set to ID 7 by default (most SCSI controllers useID 7). Wide SCSI devices can also use SCSI IDs 8 through 15.SCSI IDs can only be duplicated on the same controller if thedevices using the same ID are not attached to the same bus.If necessary, the Adaptec RAID controller ID can be changed toany ID from 0 through 7. You can use SMOR or the Configure
