Dell Adaptec U320 SCSI Raid 0 or 1 Controller Card - Manual (Page 11)

Voltage Differential (HVD) devices is not suggested. HVD devices will adversely affect other devices attached to the same
channel and could cause a working Ultra320 channel to become nonfunctional, due to distance constraints inherent in using
some of these older devices.
The Adaptec U320 SCSI RAID 0 or 1 controller supports the following RAID levels:
RAID Level 0 : Up to 4 hard drives
RAID Level 1 : 2 hard drives
Plan to utilize the number of hard drives supported by the controller and the desired RAID level.
More details about configuring and using SCSI drives and devices are available in " Configuring SCSI Drives ".
Connecting Internal Hard Drives
To connect your internal SCSI drives:
1. Install the hard drives into the hard drive bays of your system. Refer to your system documentation for more
information.
2. Attach the nonterminated end of the 68-pin internal LVD SCSI cable to the Adaptec U320 SCSI RAID 0 or 1 adapter's
Channel A Connector.
NOTE: You may connect your SCSI hard drives to the internal LVD/SE or external VHDCI connector on the
Adaptec U320 SCSI RAID 0 or 1 adapter.
3. Plug the internal Ultra320/160 and Ultra2 SCSI devices to the other cable connectors, starting with the connector at
the terminated end of the cable.
4. Repeat for each additional hard drive as applicable.
5. Attach power cables to drives as applicable.
Connecting External Devices
NOTE: Refer to your system documentation to determine which devices are supported with your system.
To connect your external SCSI devices:
1. Connect one end of an external SCSI cable to the external Ultra 320/160 connector on the Adaptec U320 SCSI RAID