•The lower righthand device slot of the BA370 shelf within the RA7000 or ESA 10000 RAID array subsystems. This position minimizes cable lengths and interference with disks.
•A wide BA356 which has been upgraded to the 180-watt power supply with the DS-BA35X-HH option.
A DS-DWZZH-03 or DS-DWZZH-05 UltraSCSI hub:
•Improves the reliability of the detection of cable faults.
•Provides for bus isolation of cluster systems while allowing the remaining connections to continue to operate.
•Allows for more separation of systems and storage in a cluster configuration, because each SCSI bus segment can be up to 25 meters in length. This allows a total separation of nearly 50 meters between a system and the storage.
______________________ Note _______________________
The DS-DWZZH-03/05 UltraSCSI hubs cannot be connected to a StorageWorks BA35X storage shelf because the storage shelf does not provide termination power to the hub.
2.8 SCSI Cables
If you are using shared SCSI buses, you must determine if you need cables with connectors that are low-density 50-pins, high-density 50-pins, high-density 68-pins (HD68), or VHDCI (UltraSCSI). If you are using an UltraSCSI hub, you will need HD68 to VHDCI and VHDCI to VHDCI cables. In some cases, you also have the choice of straight or right-angle connectors. In addition, each supported cable comes in various lengths. Use the shortest possible cables to adhere to the limits on SCSI bus length.
Table 2–3 describes each supported cable and the context in which you would use the cable. Some Compaq equivalent 6-3 part numbers are not provided.
2–12Hardware Requirements and Restrictions
