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How to migrate SQL 2012 Cluster to new SAN storage without down time?

Last Modified: 2016-06-24
We have a 2 node SQL cluster (Vmware 6.0,  Windows 2012, SQL 2012) in an active/Passive model.  Both nodes currently connect via iscsi (through windows iscsi initiator) to shared LUNs on a equallogic SAN.

We are replacing the aging equallogic with a new Compellent SAN.

Are there any articles/KB/discussions out there on how to do a migration of the shared iscsi sql disks to a new iscsi SAN with minimal (or better, zero) down time?

The SQL DB's host our main web site and we can't afford to have much down time (anything more than a couple of minutes is too much).  

Anyone have any recommendations/experienceon how to get this done?

We can do the OS/Swap disks via vmware storage vmotion as they are VMDK's.  but the data/log disks for sql are shared iscsi luns on the SAN and equallogic doesn't talk to Compellent so we can't do a copy directly.

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Scott PletcherSenior DBA
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