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07-14-2011 09:00 AM
07-14-2011 09:00 AM
When to use a FOM on P4000?
Hi,
I have a P4000 SAN configured as follows:
4 nodes in building 1 and 4 nodes in building2 configured as a single cluster with 8 nodes.
The buildings are linked by two fiber intersite links and both are on the same subnet, so just one big dedicated iSCSI network.
I have 3 esx hosts in each building which can see all of my volumes on the P4000, all the volumes are network raid 10 (2 way mirror).
I have started managers running on 3 nodes in building 1 and 2 nodes in building 2, so 5 regular managers among 8 nodes.
If I lose one of the buildings will my volumes still be available? Do I need a FOM in this configuration?
Any clarification would be appreciated.
Thanks,
D
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07-15-2011 04:40 AM
07-15-2011 04:40 AM
Re: When to use a FOM on P4000?
FOM as the 5th Manager on the 3rd Site (with access to both the Sites)
As the 5th manager if present on any of the 2 sites can result in Quorum loss, if the Site that went down had 3 of the 5 managers.
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