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virtualised storage and servers

pma111
pma111 asked
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Apologies in advance for the novice question.

Does server virtualisation and storage go hand in hand? Or can you have one without the other? Say if you ran 5 virtual servers from one physical server that DID have internal storage drives - does that assume your virtualisaing storage between the 5 servers?

Or does storing all data from the virtual servers on a SAN equate to "virtual storage"?

Jargon free answers would be most helpful.
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Hi,

They can go hand in hand and you can have one without the other. If you have a host with five VM's on it connecting to local storage that means you are sharing your storage between the five servers. This also goes for ISCSI/NFS/Fibre you are presenting a LUN from your storage to the Host for your VM's to use, I would say this is the majority of how VM environment are setup.

If you have remote storage and have an appliance that controls your storage and your Hosts connect to the appliance then you are virtualizing your storage because the appliance can have a number of storage device behind and it is presenting a logical block of storage to your hosts.

Hope this helps,
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017
Commented:
If you had phsyical disks, I would class that as physical storage.

But when you take 5 physical disks, and Create an Array, and then you divide up the array into Chunks, this could be considered virtual storage, as the storage is somewhere on those 5 physical disks.
Andrew Hancock (VMware vExpert / EE Fellow)VMware and Virtualization Consultant
Fellow 2018
Expert of the Year 2017

Commented:
SANs are often referred to as storage virtualisation for the reason above.

unless you map a  server to a one to one relationship with a physical disk. this could be a physical or virtual server.

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Commented:
That was my suspicion, thanks for confirming.