ESXi, datastore limitation

Hi, I have a RAID 5 configuration.
Available space is 2.7GB after loading Esxi via the iso CD image. Default install.
When I go into the vmware client piece and look at the datastore.  There isn't one created by default.  When I go to create one, the max that I can allocate is around 750GB (instead of 2.7TB).

what am I missing?
I was hoping to see the 2.7TB space.
seven45Asked:
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Paul SolovyovskySenior IT AdvisorCommented:
The max datastore is 2TB-512MB.  You should make at least two and possibley 3-4 500GB-1TB datastores to avoid scsi locking issues with too many VMs in a datastore.
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coolsport00Commented:
Correct; you need to make sure you're BLOCK SIZE when adding storage is sufficient (see Config Max Guide, pg. 3-4) to allocate the storage amt you want (*MB BLOCK = 2TB):
http://www.vmware.com/pdf/vsphere4/r40/vsp_40_config_max.pdf

I concur with "paul..."...don't create too large a datastore all in 1 chunk if you can help it. It's best to spread the storage out over a few 'stores'.

Regards,

~coolsport00
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DavidPresidentCommented:
You hit the dreaded 2TB limit.  with 32-bit addressing, and 10-byte SCSI Commands, the largest # of blocks is FFFFFFFFh = 2.09TB.  
To get around this limit, you need a few things to come together
 * your RAID controller must support 16-byte commands ... so check specs & look for updates.
 * Your target O/S & drivers need it (I.e, You need Win2K3 SP1 for it to work, w/o SP1 it won't work)
 * VMWare needs support
P.S. Do not just upgrade firmware w/o checking release notes.  Going from 32-bit to larger addressing will require metadata changes, and this might just blow away your data.
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DavidPresidentCommented:
(so 2.7TB needs 33 bits, the leading bit went into the bitbucket, that is why you were left with 750GB)
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seven45Author Commented:
So I created a Datastore of 500GB with vmfs3. I went back to add additional storage with the Disk/LUN option and this time it's blank. I can't see anything in there to choose from.
 
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coolsport00Commented:
You created the 500GB datastore from the available disks, correct?...the 2.7TB of disk storage? Since you already used that RAID/disk storage, you won't see anything else.

What you need to do now is create an extent of that datastore. On the datastore you just added, right-click on it and select 'Properties'. Follow the instructions on this link to finalize adding the additional space:
http://blog.wilmsenit.nl/?p=630

Regards,
~coolsport00
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seven45Author Commented:
Thanks coolsport00.  I did try and use the extent successfully and was able to increase, but only upto 750GB.

I'm still trying to figure out a way to utilize the "capacity" of 2.7TB rather than the "available" space of 742GB.  It mentioned above about the 2TB limitation but I thought multiple datastores would solve it, but I dont see any additional (since I've already used that RAID/Disk Storage as you mentioned).

I've tried it with the different block sizes---but no luck.

Ultimate goal is to make all the space available---any ideas there.
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coolsport00Commented:
Yeah, the max you could use is only 2TB for an 8MB block size. I'm having this (somewhat) of the same issue myself, but slightly different than yours (mine is RDM-based, whereas yours is datastore based) :)

The only other recommendation I have is to reconfigure your RAID differently to where you can add 2 datastores. I'm not sure how many disks you have associated with your RAID currently. You may not have enough disks to have 2 RAID5s?

~coolsport00
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seven45Author Commented:
i have 4 1 TB drives with a Raid 5 Setup.  

I'm wondering if I load Hyper-V---I may have better luck recognizing all of the Capacity.
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coolsport00Commented:
You would as there is no storage size limit because VM storage uses Windows OS.

~coolsport00
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Soulja53 6F 75 6C 6A 61 Commented:
This is the exact reason I went from ESXi to Xen Server.
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Paul SolovyovskySenior IT AdvisorCommented:
I would use hyper v before going to xen unless I'm running citric. Has the least features and needs moe handholding than VMWAre or hyperv
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