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Timber_Wolf
Contributor
Contributor

ESX Failover Procedure between two SAN's

Hi im looking to compile a procedure to failover between two SAN's in my case two IBM DS4800 SAN's without going the LVM.ENABLERESIGNATURE = 1 route (I was waiting for 6 hours plus for it to complete)

Any help would be great!

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6 Replies
AndreTheGiant
Immortal
Immortal

You can use VMware SRM

Andre

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Andrew | http://about.me/amauro | http://vinfrastructure.it/ | @Andrea_Mauro
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Timber_Wolf
Contributor
Contributor

Currently and unfortunatly i will have to do without SRM, thank you vmware for your great pricing model Smiley Wink

Is there a LUN id restriction must the LUN ids on the Primary and the secondary SAN match??

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AndreTheGiant
Immortal
Immortal

Is there a LUN id restriction must the LUN ids on the Primary and the secondary SAN match??

Do you mean at storage level or at ESX level?

In the second case there is no need to id match (it is used the volume UUID).

Andre

**if you found this or any other answer useful please consider allocating points for helpful or correct answers

Andrew | http://about.me/amauro | http://vinfrastructure.it/ | @Andrea_Mauro
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Timber_Wolf
Contributor
Contributor

SAN level, i switched from my primary SAN to my secondary SAN and vmware saw the volumes as SNAP's other ESX boxes it saw the volumes as new volumes and wanted to format them.

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ftempel
Enthusiast
Enthusiast

I had a similar issue here with connecting a CA replica (HP SANs) to an ESX server. ESX sees it as a snapshot LUN and doesn't allow its use. Fortunately there's a solution for that in the LVM.DisallowSnapshotLUN advanced configuration parameter (set it to "0").

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kjb007
Immortal
Immortal

I use this method in failover to DR site. I also use DisallowSnapshotLun, instead of resignature. No modification necessarry on the datastore side. Just set the value, and rescan. You want to make sure you only have one SAN active at a time, otherwise, you risk corruption if both copies are available at the same time.

-KjB

VMware vExpert

vExpert/VCP/VCAP vmwise.com / @vmwise -KjB
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