Solved

Expanding VMWare DataStore

Posted on 2015-01-23
4
266 Views
Last Modified: 2016-11-23
Hi,

We are expanding our RAID set on our Powervault SAN. Current Dell Powervault SANs allow you to hot add drives to expand a RAID.

We'll be expanding the actual RAID and then the Powervault Virtual Disk which takes up the entire room of the RAID Array.

After this is done, we will of course need to expand the VMware Datastore. We are running ESXi 5.5. How do you go about hot expanding a datastore?

Thanks, Jonathan
0
Comment
Question by:RFVDB
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 8

Accepted Solution

by:
Shahnawaz Ahmed earned 500 total points
ID: 40567651
Try Vmware KB Article

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1017662

OR You can simply present another LUN and add it to the existing datastore to increase its size. re-scan the storage adapters on your ESXi hosts and then increase the datastore size from its properties window.
0
 
LVL 120
ID: 40567695
You may want to think carefully in doing this, as RAID expansion, can take many hours or days to complete successfully, as the current RAID is broken, and expanded on the fly, this can also cause massive work for all the disks, and sometimes can cause disks to fail prematurely.

You may also want to consider, the creation of a new RAID array, and then creating a new datastore and presenting to ESXi.

Sometimes, increasing a datastore is not possible, if ESXi 5.5 OS installation, also shares the same LUN, due to the maximum number of partitions per LUN, and it then involves manually using partition table utilities to alter the partition layout to increase the VMFS partition.

So if after selecting the current datastore, and selecting properties to Increase the datastore, it does not appear correctly, this could be the cause.
0
 

Author Comment

by:RFVDB
ID: 40585251
Thanks Shahnawaz, looks like your link will do the trick. I'll let you know how it goes.

Andrew. Right, luckily the SAN has a hot add option to expand the RAID and it will do it in the background in a live production area. Once this is done, we can then expand it in VMware.

In normal circumstances I would move the VMs to another datastore but in this case its a small setup and there's only one SAN datastore that's completely used up.

Luckily ESXi is installed locally on all three hosts.
0
 
LVL 120
ID: 40585257
Yes, they all do it live, but it will take time to complete, and performance can be poor!

Also make sure you have full backups before you start!
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When we purchase storage, we typically are advertised storage of 500GB, 1TB, 2TB and so on. However, when you actually install it into your computer, your 500GB HDD will actually show up as 465GB. Why? It has to do with the way people and computers…
The question appears often enough, how do I transfer my data from my old server to the new server while preserving file shares, share permissions, and NTFS permisions.  Here are my tips for handling such a transfer.
This tutorial will walk an individual through the steps necessary to enable the VMware\Hyper-V licensed feature of Backup Exec 2012. In addition, how to add a VMware server and configure a backup job. The first step is to acquire the necessary licen…
This Micro Tutorial will teach you how to reformat your flash drive. Sometimes your flash drive may have issues carrying files so this will completely restore it to manufacturing settings. Make sure to backup all files before reformatting. This w…

738 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question