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Compass Architecture

     
Enterprise Tape Library System
----> XLS TOUR <----
XLS TOUR OVERVIEW XLS AT A GLANCE COMPASS ARCHITECHTURE LRM & MEM XLS CONFIGURATIONS X-LINK INTERFACE
Libraryrobotics photograph
Robotics never leave the LRM to access cartidges in the MEM, insuring the fastest access times and the highest reliability
lrm photograph robotics photograph
LRM In just 21" of horizontal travel the XLS robot can access over 2,800 tapes
mem photograph mem photograph
MEM Each MEM contains 1,075 cartridge slots in less than nine square feet of IT floor space.

POWERFUL COMPASS ARCHITECTURE

Qualstar's Compass Architecture™ (patent pending) is our unique robotic design. Compass Architecture delivers a library systems where one highly reliable

robot travels an average of just 21 inches horizontally to access over 2,800 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 350 slots and grow in easy increments to over 6,000 slots as your storage requirements grow. Storage slots and tape drives are readily added while maintaining data access and controlling cost.


HIGHLY 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, MEMs, house up to 1,075 additional storage slots in an economical and very compact footprint


LRM - THE LIBRARY RESOURCE MODULE

Two distinct LRM models house up to 20 drives and 465 slots, or up to 32 drives and 655 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 MEM contains 1,075 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 96. Or, two MEMs can be added to one LRM to deliver a configuration that packs over 1 petabyte (native) in less than 26 square feet of valuable IT floor space. Capacity expansion is both quick and cost effective. LRMs and MEMs lock together forming one unit
 


An LRM holds any mix of up to 20 or 32 Fibre Channel or SCSI LTO drives depending on the model. Bays holding up to 4 tape drives or 30 media storage slots can be mixed and matched to meet changing requirements. Up to 40 I/O slots are supported in each LRM.

XLS HIGHLIGHTS
COMPONENT LRM 820500 LRM 832700 MEM
Drive Bays – Standard 1 with 4 drive slots 2 with 8 drive slots  
Drive Bays – Optional Up to 4 additional bays
with 4 drive slots in each
Up to 6 additional bays
with 4 drive slots in each
 
Cartridge Slots – Standard 355* 435* 1,075
Cartridge Slots – Optional Add 110 Add 110 or 220  
I/O Slots – Standard 10 20  
I/O Slots – Optional Add 10 or 30 (maximum 40) Add 20 (maximum 40)  
Equipment Bay Options 6U or 8U 6U or 8U  
Supported Tape Drives LTO FC or SCSI LTO FC or SCSI  
Library Interfaces FC or SCSI added
in increments of 2 (maximum 8)
FC or SCSI added
in increments of 2 (maximum 8)
 
N+1 Power Optional Standard  
*Each additional drive bay subtracts 30 tape slots

XLS SPECIFICATIONS
 
Specifications LRM MEM
Dimensions 820500
(w, d, h)
Dimensions 832700
(w, d, h)
35 x 35 x 78 in
88 x 88 x 198 cm
45 x 35 x 78 in
113 x 88 x 198 cm
35 x 35 x 78 in
88 x 88 x 198 cm
Weight 820500
(fully populated)
Weight 832700
(fully populated)
1,202 lbs
545 kg
1,334 lbs
505 kg
1,057 lbs
479 kg
Power Requirements 100 – 240 VAC • 48 – 62 Hz  
Power Consumption See XLS Product Specification  
Reliability > 2,000,000 MEBF  
MTTR < 30 minutes  
XLS Performance
  • Load a drive or slot within an LRM:  11 seconds average
  • Load a drive or slot to / from an MEM: 12 seconds average
         
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