Hard drive, Device termination, General guidelines – Dell Precision 370 User Manual
Page 54: Scsi cables
Device Termination
SCSI logic requires that termination be enabled for the two devices at opposite ends of the SCSI chain and disabled for all
devices in between.
It is recommended that you use terminated cables and that you disable termination on all devices. See the documentation
provided with any optional SCSI device you purchase for information on disabling termination on the device.
General Guidelines
Follow these general guidelines when installing SCSI devices in your computer:
Although you install SCSI devices essentially the same way as other devices, their configuration requirements are
different. For details on configuring your particular SCSI subsystem, see the documentation for your SCSI devices
and/or your host adapter card.
Configure the device for a SCSI ID number and disable termination, if necessary.
Connect one end of the external SCSI cable to the connector on the back of the SCSI device. Attach the other end of
the external SCSI cable to the connector on the controller card installed in the computer.
After you install a SCSI hard drive, Primary Drive 0 and Primary Drive 1 should be set to None in
no IDE hard drives are installed.
You may need to use programs other than those provided with the operating system to partition and format SCSI hard
drives. See the documentation that came with your SCSI software drivers for information on installing the appropriate
drivers and preparing your SCSI hard drive for use.
SCSI Cables
Ultra 320 (optional on the Dell Precision 370 computer), Ultra 160/m and Ultra2/Wide LVD drives (typically hard drives) both
use a 68-pin cable. One end of the cable attaches to the SCSI connector on the system board or the SCSI controller card
installed in your computer. The remaining connectors on the cable attach to the various drives.
Narrow SCSI drives (tape drives, CD drives, and some hard drives) use a 50-pin cable. One end of this cable attaches to the
SCSI controller card. The remaining connectors on the cable attach to the various narrow SCSI devices.
NOTICE:
Dell recommends that you use only SCSI cables purchased from Dell. Cables purchased elsewhere are not
guaranteed to work with Dell computers.
Hard Drive
CAUTION:
Before you begin any of the procedures in this section, follow the safety instructions in the
Product Information Guide.
CAUTION:
To guard against electrical shock, always unplug your computer from the electrical outlet before
opening the cover.
NOTICE:
To avoid damage to the drive, do not set it on a hard surface. Instead, set the drive on a surface, such as a
foam pad, that will sufficiently cushion it.
1. If you are replacing a hard drive that contains data you want to keep, back up your files before you begin this
procedure.