Step 8 Connect SCSI Cables, Continued
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 (no more than 3 meters for Fast SCSI, no more than 1.5 meters for an
•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
•do not mix cable types (choose either flat or rounded and shielded or
•ribbon cables have fairly good
Step 9 Set Target IDs
Set target identifiers (TIDs) on the SCSI devices. Each device in a specific SCSI channel must have a unique TID in that channel.
Priority | Highest |
|
| Lowest | ||
|
|
|
|
|
|
|
TID | 7 | 6 | 5 … 2 | 1 | 0 15 14 … 9 | 8 |
|
|
|
|
|
|
|
Important
IDs regardless of the channel they are connected to.
ID 0 cannot be used for
62MegaRAID Express 500 Hardware Guide