Dell PE-2850 and AX150i Dual Proc-SAN (iscsi SAN)

[Johan De Meersman]

hmm... I'm not too familiar with emc, but I know that Hitachi's HDLM
software can hide this kind of stuff - I assume powerpath should be able
to do something similar.

The fact that you've got two devices is simply because of the dual path,
although to have a truly redundant infrastructure, you'd need quad paths:

[Damn, I suck at ascii drawing. Have a look at http://www.tuxera.be/san.png]

In this setup (the hosts are obviously in a failover or loadbalancing
cluster), there's no longer a single point of failure anywhere.



Ray Charles wrote:
>
> Hi,
>
> The host box that connects to the SAN, is seeing the
> one SAN volume I created as two uniq volumes, /dev/sdb
> and /dev/sdc. Even though I only created one.  So it
> seems that I have a phantom volume. How do fix this??
>
>
> Running CentOS-4.3 w/iscsi_sfnet initiator.
> I've got a new PE2850 with a PCI-x intel
> 1000MT-DualPort card for the iSCSI connection. Need to
> have 2 paths to the SAN one to each side of the SAN A
> and  B.
>
> I installed PowerPath, via RPM, seems to have
> installed fine and starts at boot w/o error.
> Also installed some EMC/Navisphere utils too, rpms
> installed w/o error.
>
>
> TIA-
> Ray
>
>
>
>
>
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