Can I increase the size of a EMC LUN

Can I do this without losing or corrupting data in a VMware environment?
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Schnell SolutionsSystems Infrastructure EngineerCommented:
You can and your data is not going to be corrupted.

Your SAN administrator will increment the LUN size, and you will even not notice it. :)

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tbs_mnpAuthor Commented:
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
It will not Auto-Resize in VMware vSphere (ESXi ) though!
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tbs_mnpAuthor Commented:
Do I need to manually?
Schnell SolutionsSystems Infrastructure EngineerCommented:
is the expansion going to be on the RDM or the Data Store where are all your VMs?
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
Yes, you will often need to resize the datastore manually. If  a RDM LUN to a VM, you will need to re-size the OS partition.

let us know which it is.
tbs_mnpAuthor Commented:
What we would like to do is create a LUN (LUN A) 3TB large from our SATA Pool 2 (10TB AVAILABLE). We will tie a drive to this LUN on a virtual windows server. If that space becomes full, and the LUN becomes full as well, we would like to make the LUN larger, essentially expanding the Windows Disk. Whichever is the best way to do that and not lose data and have VMware see this change, I don't know.
tbs_mnpAuthor Commented:
Both, essentially. Expand the datastore, extend the Disk on the windows server.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
If you are presenting a LUN direct to a VM, it's actually got nothing to do with vSphere ESXi.

Just -Expand/Extend the volume in the OS.
Schnell SolutionsSystems Infrastructure EngineerCommented:
Yeap, You can make these changes without any issue. Be aware that after doing it for your SAN and applying it yo your Windows VM, you will require to access the Windows Disk Management and claim the expanded data into your existing volume.
tbs_mnpAuthor Commented:
Gotcha. So once I extend LUN from the SAN, I can go into the VM and extend the volume from windows management no problem.
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
That is correct.
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