Chapter 1: Cabling Concepts and Best Practices 7
Figure 3 Passive SFP Transceiver with Copper Cable
1. Copper Cable
2. Passive SFP Transceiver
Host Adapters Each connection from a host port on a controller tray or a controller-drive tray to a
host is made through a host adapter on the host. A host adapter can be a host bus
adapter (HBA) for Fibre Channel or SAS connections, a host channel adapter (HCA)
for InfiniBand connections, or an Ethernet adapter for iSCSI connections. The host
adapter provides the interface to the internal bus of the host. For hardware
redundancy, use two host adapters in each host computer. The two host adapters must
be of the same type (HBAs, HCAs, or Ethernet). For duplex controller trays or duplex
controller-drive trays, connect each host adapter to a different controller in a
controller tray or a controller-drive tray to make sure that the server will be accessible
even if one HBA or one controller fails.
ATTENTION Possible loss of data access – Do not use a combination of HBAs from
different vendors in the same storage area network (SAN). For the HBAs to perform
correctly, use HBAs from only one manufacturer in a SAN.
You can obtain information about supported host adapters from the NetApp
Interoperability Matrix Tool (IMT). To check for current compatibility, visit the web
site at: http://now.netapp.com.
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