Component
Redundancy
Host/server (see note)
Redundant
Host adapter
Redundant
Host-to-controller cable
Redundant
Switch
Redundant
Controller
Redundant
Mixed topologies
This section describes an example host cabling configuration where a storage array connects to one
hosts directly and to two other hosts through a switched fabric. The host adapters in the hosts might
be HBAs for Fibre Channel or SAS, HCAs for InfiniBand, or Ethernet for iSCSI. The switches must
support the connection type (Fibre Channel, InfiniBand or Ethernet) used between the host and the
storage array.
The example in the figure identifies HBA1 and HBA2 on each host as connecting points. For other
configurations, these connecting points might be Ethernet adapters for iSCSI connections, or a
combination of one HBA and one iSCSI Ethernet adapter.
When a host is cabled to a duplex controller shelf (controller-drive tray), each attached host should
have two host adapters installed. For redundancy, attach each of the host adapters to a different
switch (or switch zone) so that one switch (or zone) connects to controller A and the other to
controller B in the controller shelf. In the case where a host has one HBA and one iSCSI Ethernet
adapter, the two connections might require two different types of switches. Redundancy for a host
that attaches directly to a storage array requires that each host adapter attach to a different controller.
Attention:
Possible loss of data access – You must install alternate path software or an alternate
path (failover) driver on the host to support failover in the event of an HBA failure or a host
channel failure.
Note:
The hosts/servers in this example must be clustered to be redundant.
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Summary of Contents for StorNext QD7000
Page 1: ...Hardware Cabling Guide StorNext QD7000 Firmware 8 40 xx xx 6 68683 01 Rev A...
Page 7: ...Preface Hardware Cabling Guide vii...
Page 10: ...E Series Hardware Cabling Guide December 2017 215 11792_B0 doccomments netapp com...
Page 11: ......
Page 90: ...One E5660 controller drive tray and one DE6600 drive tray Drive shelf or drive tray cabling 81...
Page 106: ...One E2760 controller drive tray and one drive tray Drive shelf or drive tray cabling 97...