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what happens to a configured datastore on a stand alone host when you move it into a farm?

Posted on 2011-10-28
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Last Modified: 2012-05-12
The other day I asked a question about moving a stand alone ESXi host into our existing farm and hanncocka was kind enough to give me his advice. My question included the comments I made below;

"I am not sure I understand you step one or maybe I did not explain my question properly....We have a VCENTER with a DataCenter under it then a Cluster....under the cluster we have 4 hosts. I want to remove the oldest and slowest host and bring in a newer host that has the same version of ESXi 4.1 installed on it. After doing some research I would;

1. vmotion all the VMs off the older host
2. right click the cluster and remove the older host
3. right click the cluster again and select ADD host
4. enter the IP address and root name and password of the newer host we want to bring in
5. click next and hopfully that will bring in our newer host
6. vmotion some VMs over to the new host now that it is on the farm

Is it that simple? I know you know a lot more about this then I do"

I got a postive confirmation that I had the right idea, but I started thinking about it and our host that is not on the farm has been used for VMs before, although they are currrently powered off and the NIC card is not set to reconnect on startup. But, we used this host for quite a while and it's datastores were all pointing to a Buffalo NAS, that used an iSCSI connection. Our farm has its datastores on an EQUALLOCIC SAN. Will I need to delete the datastore configuration on the old ESXi stand lone host? How will the former stand alone host know which datastores it can use once I pull it into the farm? I was hoping to go throught he procedure this weekend but want to make sure I have all the steps right and complete all the configs first...thanks

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Question by:Thor2923
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ID: 37044891
what happens to a configured datastore on a stand alone host when you move it into a farm?

the datastore is attached to the ESXi host, it has nothing to do with the Cluster or Farm.

Answer - NOTHING
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Andrew Hancock (VMware vExpert / EE MVE^2) earned 2000 total points
ID: 37044897
That datastore will be seen as a single datastore because it is attached to a single ESX host, if it was connected to multiple hosts in the "farm", it would become a shared datastore supporting multipe hosts.
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ID: 37044909
You will need to ADD all the new datastores to the OLD HOST.

or use VMware Converter, to move the OLD VMs on old datastore to new host.
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by:Thor2923
ID: 37044912
so are u saying if I attach the stand alone to the farm, it will see its old datastore and I will be able to use it and if I want to use the datastore pointing to the equallogic san, it will just configured it after it is moved over?
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ID: 37044916
vMotion and Storage vMotion CAN only operate if ALL Hosts CAN see ALL the shared storage.
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ID: 37044948
Correct.
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LVL 125
ID: 37044956
so are u saying if I attach the stand alone to the farm, it will see its old datastore and I will be able to use it

Correct.

and if I want to use the datastore pointing to the equallogic san, it will just configured it after it is moved over?

I do not understand this, you will need to configure and add the equalogic SAN datastores/LUNs to this standalone server. (it does not matter if you do it before or after adding to vCenter)
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by:Thor2923
ID: 37045339
I am going through private course right now on vmware. Nothing official, just another employee is going through the VMWARE course study with is and we just covered storage/datastores and luns a couple days ago. I will get with our more qualified vmware person for configuration after the move...thanks
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ID: 37045513
If you have any questions, just ask, or post, for the Experts to help.
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by:Thor2923
ID: 37046356
If I give you screen shots from the storage on the stand alone vmhost and the storage on the farm, will you be able to tell me what to do? I see in the stand alone, if i select CONFIGURATION/STORAGE/ADD STORAGE and select DISK/LUN there is nothing displayed, which I am told there are no LUNS available. If select NFS or NETWORK FILE SYSTEM, could you help me with the parms based on screen shots of the farm storage?...just tell me which pages to capture...thanks
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ID: 37046563
yes, post away
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LVL 125
ID: 37047111
Okay, all the datastores, EQ-ISOs, EQ-OS DRIVES, EQ-OSDRIVES 2 are all LUNs on your EQ.

Checkout my lovely video here of how to add iSCSI LUNs to ESXi 4.1

Andys' Videos New HD Video - Adding iSCSI storage to a VMware vSphere ESX/ESXi 4.x host server
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