Toshiba Magnia 560S - Manual (Page 89)

Installation Steps
Hardware Installation
71
Step 7 Connect SCSI Cables
Connect SCSI cables to SCSI devices. RAID Controller Kit-G provides two SCSI
connectors: J1, the SCSI channel internal high-density 68-pin connector for Wide (16-
bit) SCSI and J7, the SCSI channel external very high-density 68-pin connector.
Connect SCSI Devices
When connecting SCSI devices, use the procedure in Table 6.8.
Table 6.8 Procedure for Connecting SCSI Devices
Step Action
1 Disable termination on any SCSI device that does not sit at the end of the
SCSI bus.
2 Configure all SCSI devices to supply TermPWR.
3 Set proper target IDs (TIDs) for all SCSI devices.
4 The cable length can be up to 20 meters.
Cable Suggestions
System throughput problems can occur if SCSI cable use is not maximized. You
should:
•
You can use cables up to 12 meters for LVD devices.
•
For single-ended SCSI devices, use the shortest SCSI cables.
•
Use active termination.
•
Avoid clustering the cable nodes.
•
Cable stub length should be no more than 0.1 meter (4 inches.)
•
Route SCSI cables carefully.
•
Use high impedance cables.
•
Use flat cables for inside the enclosure, and round, shielded cables for outside of the
enclosure.
•
Ribbon cables have fairly good cross-talk rejection characteristics.