PERC 3/QC Hardware Installation 145
Step 6—Connect SCSI Cables
Connect SCSI cables to SCSI devices. PERC 3/QC provides two internal
SCSI connectors, J1 (channel 1) and J4 (channel 0), which are the SCSI
channel internal high-density 68-pin connectors for Wide (16-bit) SCSI.
PERC 3/QC provides four external SCSI connectors: J13 (channels 0 and 1)
and J22 (channels 2 and 3), the SCSI channel external ultra high-density
68-pin connectors for Wide (16-bit) SCSI. Only one cable should be
connected to any available channel.
Make sure that pin 1 on the cable is connected to pin 1 on the PERC 3/QC
card. Figure 10-7 displays SCSI cables being connected to the card.
Figure 10-7. Connecting SCSI Cables
Connect SCSI Devices
The cable length should not exceed three meters for Fast SCSI (10 MB/s)
devices or three meters for a four drive Ultra2 SCSI drive system. The cable
length can be up to 12 meters for low-voltage differential (LVD) devices.
The cable length should not exceed six meters for non-Fast SCSI devices.
Perform the following steps to connect SCSI devices:
1Disable termination on any SCSI device that does not sit at the end of
the SCSI bus.
2Configure all SCSI devices to supply TermPWR.
3Set proper target IDs (TIDs) for all SCSI devices.
Pin 1
J1 J4
J13
J22