IBM System Storage DS3500 Introduction And Implementation Manual page 66

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Switch-attached DS3500
As the DS3500 subsystem can support many more than two host servers, let us consider a
larger configuration. For more than two servers, a SAN switch is required. Figure 3-9 displays
a sample configuration with four host servers attached to a dual controller DS3500. Each host
has two FC HBAs for redundant I/O path support.
Figure 3-9 DS3500 connected to hosts through FC switch SAN
If Enhanced Remote Mirroring (ERM) feature is planned to be used, the fourth FC port on
each controller must be dedicated to for this connection. No host servers should be zoned or
configured to used these ports. ERM can only be used with a SAN switch environment.
Cable management and labeling
Cable management and labeling for solutions should cover both the installation, routing and
labeling of all cables including power, ethernet LAN network, SAS for both host attachments
and backend expansions and fiber channel. Cable management and labeling needs have
expanded from the traditional labeling of network connections to management and labeling of
most cable connections between your servers, disk subsystems, multiple network
connections, and power for all the subsystems involved in your solution. In many cases
different components of the solution may have differing cable needs. Multiple unique systems
could be located in the same rack; or a system could span across multiple racks. In some
cases the solution could be configured where components might not be physically located in
the same room, building, or site.
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IBM System Storage DS3500: Introduction and Implementation Guide
Draft Document for Review March 28, 2011 12:24 pm