Setting up redundant
path support on the PERC H830 adapter
The PERC H830
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 (EMM0_Out and EMM1_Out) of the first enclosure must
be cabled to the in ports (EMM3_In and EMM4_In) 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.
NOTE:The PERC H830 card
supports redundant paths when used with Dell PowerVault MD3 series
disk storage enclosures.
To Set up an enclosure on the PERC
H830 card:
Connect two SAS cables from the out ports
(EMM0_Out and EMM1_Out) on your PERC H830 card to the in ports (EMM3_In
and EMM4_In) of the external enclosure.
Figure 1. PERC H830 card
portsFor information on unified mode, see the enclosure documentation
that was shipped with the enclosure.
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.
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