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40 Deploying the PERC Card
Setting up Redundant Path Support on the
PERC
H810 Adapter
The PERC H810 card can detect and use redundant paths to disks contained
in enclosures. With redundant paths to the same device, if one path fails,
another path can be used to communicate between the controller and the
device.
To set up a configuration with redundant paths, both ports on a controller
must be cabled to the In ports of a single enclosure.
To add multiple enclosures, both Out ports of the first enclosure must be
cabled to the In ports of the next enclosure.
If the connection between an Out port on the controller and an In port on an
enclosure fails, an alternate path exists through the second Out port on the
controller and the second In port on the enclosure. For more information,
see Figure 3-4.
NOTE: The PERC H810 card supports redundant paths when used with
Dell PowerVault MD1200 and Dell PowerVault MD1220 disk storage enclosures.
Perform the following steps to configure the hardware to utilize redundant
paths on the PERC H810 card:
1
Set up an enclosure on the PERC H810 card.
2
Connect two SAS cables from the
Out
ports on your PERC H810 card to
the
In
ports of the external enclosure. For more information,
see
Figure 3-4
.
NOTE: For information on Unified Mode, see the enclosure documentation
that was shipped with the enclosure.
3
To add multiple enclosures, cable both
Out
ports of the first enclosure to
both
In
ports of the next enclosure.
After you set up the hardware, the controller detects the redundant paths and
automatically utilizes them to balance the I/O load.