Connecting Multiple Suds To One Suc - Huawei OceanStor N8500 T Series Installation Manual

OceanStor N8500 Clustered NAS Storage System
Installation Guide (for T Series V100R005)
Step 3 Route and bundle cables.
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6.18 Connecting Multiple SUDs to One SUC

This section explains how to connect multiple SUDs to one SUC through mini SAS cables.
Prerequisites
The following tools and materials have been ready:
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Context
For an N8500 with the S5500T storage system as the storage unit, connecting multiple SUDs to
one SUC by conforming to the following principles:
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To connect one SUD to one SUC, attach ports EXP 0 on SUC's controllers A and B to ports PRI
on SUD's disk modules A and B. Then an expansion loop is generated, as shown in
6-27.
Issue 02 (2015-09-22)
1. Connect two Fibre Channel ports on each CNEN respectively to two Fibre Channel
switches.
2. Connect two Fibre Channel ports on each SUC's controller A and on each SUC's
controller B respectively to two Fibre Channel switches.
NOTE
For details on how to route and bundle serial cables or management network cables, see
Routing Description and
Mini SAS cables
Cable ties
Diagonal pliers
All EXP ports can connect only to PRI ports.
Expansion ports on SUC's controller A can connect only to expansion ports on SUD's disk
module A. Expansion ports on SUC's controller B can connect only to expansion ports on
SUD's disk module B.
If two or more SUDs are required to connect to the SUC, it is recommended that you set
up two expansion loop, one consisting of ports EXP 0 on SUC's controllers A and B and
the other consisting of ports EXP 1 on SUC's controllers A and B. The number of SUDs
in the two expansion loop should be consistent.
In the expansion loop that contains more than one SUDs, SUC's controllers A and B connect
to SUDs in opposite directions. The positive direction goes from SUC's controller A, port
PRI on the first SUD's disk module A, port EXP on the first SUD's disk module A, to port
PRI of the adjacent SUD's disk module A, and so on. The negative direction goes from
SUC's controller B, port PRI on the last SUD's disk module B, port EXP on the last SUD's
disk module B, to port PRI on the adjacent SUD's disk module B, and so on.
The radius of mini SAS cables must be larger than 15 mm. Reserve a clearance larger than
97 mm for wiring.
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6 N8500 Installation (with S5500T Storage System as the
13 Basic Cable Routing and Bundling
Storage Unit)
12 General Cable
Technology.
Figure
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