XLS in Action
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POWERFUL COMPASS ARCHITECTURE

Qualstar’s Compass Architecture™ (patent pending) is our unique robotic design. Compass Architecture delivers a library system where one highly reliable robot travels an average of just 21 inches horizontally to access over 3,200 tapes. Robotics located in each LRM simply reach into adjacent MEMs to access cartridges located there. The robotics always remain within the LRM cabinet, eliminating the power consumption, reliability problems and delays that can occur with robots that have to traverse at high speed between cabinets to access remote cartridges.

XLS HIGHLY MODULAR DESIGN

Start with 165 slots and grow in easy increments to more than 11,700 slots as your storage requirements grow. Storage slots and tape drives are readily added while maintaining data access and controlling cost.

THE BUILDING BLOCKS OF XLS

XLS combines two distinct modules to deliver very dense, cost-effective and flexible library systems. The Library Resource Module, LRM, is a complete, self-contained, stand-alone library and forms the base unit for the system. The Memory Expansion Modules, MEMs¹, house 535 or 1,075 additional storage slots in economical and very compact footprint.

LRM – THE LIBRARY RESOURCE MODULE

Five LRM models house up to 32 drives and 1,066 slots. Each LRM is highly scalable, making it easy to vary drive and slot ratios to optimize resources. Support for up to eight logical library partitions is built into each XLS, giving administrators the flexibility needed to economically support multiple applications in a single Simply Reliable library.

MEM – THE MEMORY EXPANSION MODULE

When additional storage is required, one or two MEMs can be easily added to each LRM. Each two MEM models contain 535 or 1,056 additional slots in less than nine square feet utilizing Qualstar’s trademark rotating carousel design. If more data transfer capability is required, adding LRMs expands the number of drives up to 159. Or, two MEMs can be added to one LRM to deliver a configuration that packs over 8 petabytes (native) in less than 28 square feet of valuable IT floor space. Capacity expansion is both quick and cost effective. LRMs and MEMs lock together forming one unit.