1-10Adaptec Ultra320 SCSI Cards User’s Guide Termination on SE internal SCSI devices is usually controlled bymanually setting a jumper or a switch on the device, or byphysically removing or installing one or more resistor moduleson the device. Termination on most external SCSI devices is controlled byinstalling or removing a SCSI terminator. However, terminationon some external SCSI devices is enabled or disabled by settinga switch on the back of the SCSI device. By default, termination on an Adaptec SCSI Card itself is set toAutomatic (the preferred method). We recommend that you donot change this default setting. This automatic setting is just forthe Adaptec SCSI Card itself; the card cannot change thetermination setting on a device. Internal and External Ultra320/Ultra160 and Ultra2 SCSI LVDSCSI buses must be terminated with an LVD terminator. This issometimes referred to as an LVD terminator or a Multimodeterminator.Defining RAIDRAID (Redundant Array of Independent Disks) offers dataprotection, outstanding data availability, excellent performance,and high capacity. A RAID is defined as: Unified array—Two or more hard drives are grouped to appearas one single device to the host system while operatingindependently of one another. Fault-tolerant redundancy—If one drive fails no data is lost.(RAID 0 is an exception to this definition because RAID 0 is notfault tolerant. See Supported RAID Levels.)
