HP Surestore 64 FW 05.01.00 and SW 07.01.00 HP StorageWorks SAN High Availabil - Page 77
Tape Device Consolidation, Tape drive consolidation
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Planning Considerations for Fibre Channel Topologies Tape Device Consolidation Providing fabric connectivity for multiple FC-AL tape drives by attaching them individually to a Fibre Channel director is likewise not a cost-effective solution. A practical solution is to consolidate the tape drives on an inexpensive loop switch, then connect the switch to a single director or edge switch E_Port. Figure 34 illustrates the consolidation of three tape drives through one B_Port connection to a director. Each tape drive has a 30-MBps bandwidth, therefore the sum of the bandwidths of all consolidated servers is slightly less (90 MBps) than the B_Port bandwidth of 1.0625 Gbps. Connecting another FC-AL tape drive to the switch would exceed the B_Port capability and adversely impact director-to-switch link performance. Other devices (such as servers) should not be connected to a switch used for tape drive consolidation. Figure 34: Tape drive consolidation SAN High Availability Planning Guide 77