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Migrating VM with RDM into another ESX host in different SAN array

Hi All,

I'm about to do my Exchange Server 2007 DR migration from one SAN array into another new SAN array but without ISL link.

so what should I expect and I do in order to make it working in the new ESXi blades connected to the new array ?
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Senior IT System Engineer
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Senior IT System Engineer
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2 Solutions
 
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Do you want to keep using an RDM in the new SAN, or change to VMDK?
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mhdganjiCommented:
Re: Options for moving Raw Device between SAN's (not just RDM)

All the options need down time for the VM:

 

Option-1:

     Cold Migration gives you a way to move all your VMs (with RDM disks) from one Storage Array to other.

     But the problem here is your RDM disks will be converted to virtual disks.

     Later you can clone this virtual disk to a RDM using vmkfstools. Then remove the vmdk and add this RDM to the VM.

 

Option- 2 :

     Remove (not delete) the RDM from the VM.

     SVMotion the VM to other Storage Array, then clone the RDM from Storage Array 1 to Storage Array 2 (using vmkfstools).

     Attach this RDM to the VM.

http://communities.vmware.com/thread/226491
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Option 3

Use  VMware vCenter Converter Standalone 5.0 to create a V2V.

See my EE Articles

HOW TO:  P2V, V2V for FREE - VMware vCenter Converter Standalone 5.0

HOW TO: Improve the transfer rate of a Physical to Virtual (P2V), Virtual to Virtual Conversion (V2V) using VMware vCenter Converter Standalone 5.0

Option 3, is very safe, because it does not touch or change the original VM, so you have a Rollback plan. You end up with the same VM, on new SAN, but it's been converted to virtual disks (vmdks) on the new SAN datastore.
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mhdganjiCommented:
I Think Cold Migration and Option 3 You Suggested Last The Same
But I Agree That Your Option is Safer !
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
No physical move with Option 3!  It's a copy/clone.

You cannot rollback, if it all goes wrong with any other option.
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Senior IT System EngineerIT ProfessionalAuthor Commented:
Hi,

Do you want to keep using an RDM in the new SAN, or change to VMDK?

I'd like to use 1.5 TB VMDK over VMFS, as I no longer implement Physical RDm for my Exchange Server due CCR working fine, I do not need to use EMC Replication manager to do the SnapView directory checking.
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Senior IT System EngineerIT ProfessionalAuthor Commented:
HancockA,

Using V2V with VMware converter sounds great :-)
the only issues at the moment is that between two SAN array, there is no ISL (Inter Switch Link) in place yet, so sVmotion is not an option.

Hm.. I am thinking to just "re-create" the VM C:\ drive only while the rest of the Database and Transaction log can be recreated again manually using Update-StorageGroupCopy (Exchange DB re-seed).
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
there is no requirement for a ISL.

Do you have a workstation or server, which can connect to both Hosts (which are connected to the SAN).

V2V copies from one ESX host (connect to old SAN), to the other ESX host (connected to new SAN). Across the network.
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Senior IT System EngineerIT ProfessionalAuthor Commented:
Do you have a workstation or server, which can connect to both Hosts (which are connected to the SAN).
Yes it is my VCenter VM itself :-)
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Okay, so you will be able to complete the V2V from this computer with VMware vCenter Converter Standalone 5.0 installed.
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Senior IT System EngineerIT ProfessionalAuthor Commented:
Many thanks for the information and solutions provided.
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Senior IT System EngineerIT ProfessionalAuthor Commented:
So is this the software that you mention "VMware vCenter Converter Standalone 5.0" --> Freeware ?
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Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, follow my Article and Links!
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