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Appendix 1
LSI Ultra2/3 LVD SCSI
3. Connecting SCSI Peripherals
A total of 30 SCSI peripherals can be connected to the onboard SCSI connector, with 15
on each channel. Before connecting peripherals to the connectors, be sure to also review
Setting Up SCSI Peripherals on the previous page.
Connecting Internal Cables for Ultra2 SCSI Devices
When connecting internal Ultra2/3 SCSI peripherals there are special SCSI cables necessary
to sustain the higher speeds of LVD signaling. If your cables are not marked, you can
identify most Ultra2/3 SCSI cables as having twisted pairs of the flat ribbon cable in
between the device connectors. These cables will usually have a terminator built into the
end of the cable.
The motherboard has two separate Ultra2/3 SCSI channels. Each channel will connect to a
separate cable. Follow these steps to connect your internal peripherals:
NOTE:
We recommend keeping your Ultra2/3 peripherals separate from your
non-Ultra2/3 peripherals. Connecting a non-Ultra2 peripheral to an Ultra2/3
SCSI bus forces the Ultra2/3 SCSI channel and any attached peripherals to drop
down to Ultra SCSI performance levels (40MBytes/sec).
STEP 1:
Locate a 68-pin internal Ultra2/3 SCSI cable. (It should look similar to
the cable below.)
STEP 2:
Plug the long end of the cable(s) to the Ultra2/3 connector(s) on the
moherboard - Channel A or B. (refer to the board layout for connector
location).
STEP 3:
Plug the remaining connectors to your internal Ultra2/3 SCSI peripher
als.
Built-in Terminator
Connect to Ultra2 Peripherals
Connect to Motherboard
Ultra2 SCSI connector
!
important!