Chapter 2 - Topologies and Operating Modes
Simplex Mode
26
Simplex Mode
The simplex operating mode uses a single Wahoo2 RAID Controller solution that provides
a limited level of redundancy. With its dual port topology, the controller also provides dual
active ports that increases the bandwidth capabilities. Essentially, there are four supported
topologies for this operating mode:
n
“Dual Port Single Host Connection” on page 26
n
“Dual Port Single Host Dual Connection” on page 27
n
“Dual Port Multi-Host Single Connection” on page 28
n
“Dual Port Multi-Host Dual Connection” on page 29
Dual Port Single Host Connection
This topology provides an entry-level RAID storage solution for single ported HBA host
system. It offers the following advantages: an initially lower cost system to deploy and is a
simple direct attached solution. It has several disadvantages: multiple points of failure (host
server, host HBA, controller, and data cable), and it has limited bandwidth capabilities due to
its single Fibre loop (200 MB/sec).
Simplex Mode Logical View - Dual Port Single Host Connection
Summary of Contents for OmniStor 4900F Series
Page 1: ......
Page 2: ......
Page 4: ......
Page 38: ...Chapter 1 Getting Started Audible Alarm 24...
Page 58: ...Chapter 2 Topologies and Operating Modes Application of Availability 44...
Page 128: ...Chapter 3 Setup and Installation Powering Off the Storage System 114...
Page 156: ...Chapter 5 Troubleshooting Problems During Bootup 142...
Page 178: ...Chapter 6 Maintenance Replacing the Enclosure 164...
Page 182: ...Appendix A Technical Information Specifications 168...
Page 196: ...Index 182...