HP StorageWorks 4000 Understanding Compaq StorageWorks RAID Array 4000 and Inf - Page 6

Understanding Compaq StorageWorks RAID Array 4000 and Infrastructure Cabling 6 Hubs Hubs provide the ability to use different fibre channel cables in the same loop to accommodate different types of infrastructure cabling. Figure 3 shows an example of a 62.5-micron multi-mode cable, a 50-micron multi-mode cable, and a 9-micron single-mode cable used in the same loop. The hub's ability to detect and bypass non-operational ports keeps the loop intact. Figure 3. Using a hub to intermix fiber types Gigabit Interface Converters These industry-standard connection devices hot plug into all Fibre Channel System components (host controllers, cables, hubs, and arrays). A shortwave GBIC (GBIC-SW) must be used with a multi-mode fibre channel cable and a long wave GBIC (GBIC-LW) must be used with a single-mode fibre channel cable. A GBIC: • Converts electrical signals into optical signals. • Converts optical signals into electrical signals. • Provides a transmission rate of 100 MB/s in each direction. A GBIC-SW provides a transmission distance between components of up to 500 meters using 50-micron, multi-mode fiber optic cable. A GBIC-LW provides a transmission distance between components of up to 10 kilometers using 9-micron, single-mode fiber optic cable. ECG02030699A