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VMWARE ESXi Storage Issue

I have an issue with one of my server i am installing ESXI 4.1

The server has 5x900GB disk on a RAID5 which means i have 3.4TB space.

I installed ESXi on a separate disk, and when login to vsphere client, i see only 1.27TB data store. i cannot add rest of the space. why is this?

attaching a screenshot of the disk. any help is appreciated!
2 Solutions
Andrew Hancock (VMware vExpert / EE MVE^2)VMware and Virtualization ConsultantCommented:
the maximum size of a VMFS datastore on ESXi 4.1 is 2TB-512bytes.

Configuration Maximums for VMware vSphere 4.1

Can you carve up the 3.4TB RAID5 into smaller Logical Drives or Virtual Disks?

or if you server supports ESXi 5.0, the maximum size of VMFS under ESXi 5.0 is 64TB, it does not have this issue.

I would recommend RAID 10, if you can suffer the loss of storage, it's much faster for read and writes than RAID 5.
George KhairallahCommented:
I believe that ESXi allows you to create 2Tb data store volumes, and when you attempt to create something much larger, the reporting on that storage is a bit erratic, and I think that's why you're seeing 1.27Tb. (that's the only explanation I can come up with as far as that).
To test, if you try to create a data store that is only 2Tb large, I suspect that it'll show up fine.

In general, I usually try to keep my data store sizes to about 600Gb each.
Is there a reason why you need all 3.4 Tb on one data store?
stratomanAuthor Commented:
Thanks....the deafault 1.27 TB datastore was there already. No, i dont need that big of a datastore. i will try and see if i can create small logical drives from the RAID group.
vmwarun - ArunCommented:
Please confirm if you trying to increase the size of the 1.27TB VMFS volume.
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