Back-End Cabling And Connecting Power; Expansion Enclosure Cabling Guidelines; Sas Redundancy; Sas Port Types - Dell Storage Center SCv2000 Deployment Manual
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Also See for Storage Center SCv2000:
- Owner's manual (42 pages) ,
- Getting started manual (19 pages) ,
- Getting started manual (20 pages)
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Back-End Cabling and Connecting Power
Back-end cabling refers to the connections between the storage system and expansion enclosures. After
the back-end cabling is complete, connect power cables to the storage system components and turn on
the hardware.
An SCv2000/SCv2020 storage system can be deployed with or without expansion enclosures.
•
When an SCv2000/SCv2020 is deployed without expansion enclosures, the storage controllers must
be interconnected using SAS cables. This connection enables SAS path redundancy between the
storage controllers and the internal disks.
•
When an SCv2000/SCv2020 is deployed with expansion enclosures, the expansion enclosures
connect to the back-end SAS ports on the storage controllers.
Expansion Enclosure Cabling Guidelines
The connection between a storage system and expansion enclosures is referred to as a SAS chain. A SAS
chain is made up of two paths, which are referred to as the A side and B side. Each side of the SAS chain
starts at the initiator only SAS port on one storage controller and ends at the initiator/target SAS port the
other storage controller
SAS Redundancy
Use redundant SAS cabling to make sure that an unavailable IO port or storage controller does not cause
a Storage Center outage.
If an IO port or storage controller becomes unavailable, the Storage Center IO moves to the redundant
path.
SAS Port Types
Each storage controller has two types of back-end SAS ports: initiator only and initiator/target.
The ports labeled A are initiator-only ports and the ports labeled B are initiator/target ports.
Figure 60. SCv2000/SCv2020 SAS Ports
1.
Storage system
3.
Initiator only ports (ports A)
5.
Storage controller 2
70
2.
Storage controller 1
4.
Initiator/target ports (ports B)
Back-End Cabling and Connecting Power
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