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v For direct connections to all other N series storage systems: Use an
LC-to-LC fibre channel optical cable and one SFP.
Connecting the expansion unit to other expansion units
When connecting the EXN1000 to other expansion units, IBM strongly
recommends using LC-to-LC fibre channel optical cables. You must use 2 SFPs
per LC-to-LC fibre channel optical cable.
Note: SFP-to-SFP fibre channel copper cables may also be used for
Grounding EXN1000 expansion units
For proper grounding, you must daisy-chain the EXN1000 expansion units
together with the provided braided copper cables and screws. If possible, you
should ground the N series storage system to the EXN1000.
Each EXN1000 expansion unit is shipped with a 0.25m (~6 inch) braided
copper cable and an M5 x 0.5 inch Phillips head screw. The copper cable has a
hole on each end for grounding shelf-to-shelf.
For detailed instructions about how to ground connected EXN1000 expansion
units in a rack, refer to the Installation and Setup Instructions for your storage
system.
Connecting the EXN1000 expansion unit to a power source
The EXN1000 expansion unit is shipped with two power supplies, installed in
bay PSU1 and bay PSU2, respectively, and an AC power cord for each power
supply. You must have separate circuit breakers for each power supply.
For detailed instructions about how to connect EXN1000 expansion units to a
power source, refer to the EXN1000 Installation and Setup Instructions.
Hot-adding an EXN1000 expansion unit to an existing loop
This section provides information about how to hot-add an EXN1000
expansion unit to an existing loop. It also tabulates the error messages that
appear on your N series storage system console if the attempt at hot-adding
was unsuccessful.
Note: The hot-added EXN1000 expansion unit must have new drives that will
connections (to a maximum of three meters) between expansion units.
be used as spares only.
Chapter 2. Connecting an EXN1000 expansion unit
15
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