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Warning!
LVD buses always require external termination; they do not
have internal terminators. Therefore, the last LVD device in a chain
must have an external terminator. Consult your computer supplies specialist
for a terminator that meets your needs.
3)
Avoid mixing LVD and SE devices in the same SCSI chain.
For performance reasons, it is important to not mix LVD and SE devices on the
same chain. An all-LVD or all-SE chain will generally perform more reliably
than a mixed chain. While it is technically possible to mix LVD and SE devices
on the same SCSI chain, doing so will limit the performance of all devices on
the chain to SE levels. An all-LVD chain will enable you to achieve the ultra-
fast transfer rates that LVD has to offer. For more information on mixed SCSI
chains, please refer to
9. Appendix 1 – SCSI Questions and Answers
.
4) Respect the maximum allowable cable length for your SCSI
chain.
In order to ensure optimum performance, you must respect the maximum
allowable length for your SCSI chain. The maximum allowable length of the
chain depends on the type of devices (SE, LVD or mixed) connected to it.
Consult the table above, or contact your computer supply specialist for more
details.
5)
Never mix HVD devices with SE or LVD devices.
HVD devices require a special controller and are not compatible with LVD or
SE devices. If you connect an HVD device to an SE or LVD device, none of the
devices will work properly. Furthermore, you may damage the devices or your
computer system.
6)
Turn on all of your SCSI peripherals before turning on your
computer.
Before turning on your computer, always power on all of the devices in your
SCSI chain. Otherwise, the computer will not recognize the devices. Also,
never leave any unpowered devices in your SCSI chain. If there is an
unpowered device in your chain, the other peripherals may not work correctly
and directory and/or data corruption may occur.
Warning!
Always power down the computer before powering off your
SCSI devices. Failure to so can result in the corruption of the hard
drive’s directory.
7) Turn off your computer and SCSI peripherals before
disconnecting them from the chain.