Adding storage to vmware

We have just purchased a new EVA enclosure & disks to expand space for VM use. Disks have been grouped and presented to our ESX servers.
What is the best way to make this space available to the ESX hosts (create new datastore under existing cluster?) and what are the basic steps to achieve this?
If it were possible/ a good idea to add to the existing datastore I think this would be preferable.
I would like to ensure that best practices are observed.
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agradminAsked:
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za_mkhIT ManagerCommented:
You can add storage to an existing datastore by using something called an Extent - but I would not recommend this. If one extent of volume goes, you lose the entire volume. So keep seperate datastores.
If the storage is presented to your server, in the VI client, rescan your Storage Adaptors. It should see/show the new LUNs.
Then click on Storage, and Add and then create a new datastore from some of the new storage that your server sees.
Thanks
 
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ryder0707Commented:
In a cluster, ensure that you scan all HBAs in all esx hosts first before adding it as datastore
This is to ensure all hosts has visibility to the new shared LUN
After scanning HBA on all hosts, add it to one host & the rest will be able to see the new datastore
Ofcoz you can add existing datastore, in fact you can have many datastores
Read the following link for better understanding on storage http://www.las-solanas.com/storage_virtualization/esx_san_performance_guide.php
Good luck!
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agradminAuthor Commented:
Thanks for the input. Do you have any recommendations for max file size when formatting the new datastore?
To best preserve space I'm tempted to select the 256Gb, 1Mb block size option - can you see instances where this may not be sufficient? We do not have any massive data repositories in the company at present. Would this be the limit for a single file?
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ryder0707Commented:
Yup & yeah this is sufficient, we have few enterprise customers with that option selected
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agradminAuthor Commented:
Thanks for your expert and timely advice - worked like a charm!
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