Chapter 2 - Topologies and Operating Modes
Daisy-Chain JBOD Enclosures
34
Daisy-Chain JBOD Enclosures
Single Bus Dual-Loop Mode
The NexStor 4000F JBOD enclosure is used as the daisy-chain enclosure to expand
the drive channels of the NexStor 4200F Series up to the limit of 96 disk drives. It is
configured as a Single Bus Dual-Loop system, where the drive plane is a
continuous 12 (twelve) drive single bus dual-loop FC-AL configuration. The
jumper, (JP3) on the Disk I/O card, should be offset (default position) or installed
on one pin only which enables this option. When enabled, it also activates the
internal hubs and provides the continuous FC loop.
Single Bus Dual-Loop JBOD Logical View - Daisy Chain Enclosures
Disk I/O Card
(Upper - Loop A)
Disk I/O Card
(Lower - Loop B)
P1
P2
P1
P2
PBC
PBC
PBC
PBC
Drive Slots 1 - 6
Drive Slots 7 - 12
Loop A
Loop B
Loop A
Loop B
4200F.book Page 34 Thursday, January 23, 2003 2:47 PM
Summary of Contents for NexStor 4200F Series
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Page 8: ...Table of Contents iv 4200F book Page iv Thursday January 23 2003 2 47 PM...
Page 12: ...About this Manual Features viii 4200F book Page viii Thursday January 23 2003 2 47 PM...
Page 32: ...Chapter 1 Getting Started Audible Alarm 20 4200F book Page 20 Thursday January 23 2003 2 47 PM...
Page 172: ...Index 160 4200F book Page 160 Thursday January 23 2003 2 47 PM...
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