VMware ESXI 4.0 max virtual disk size

JRaster
JRaster used Ask the Experts™
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I have a new install of Windows server 2003 on ESXi 4.0.  My server has only local storage, and it has two arrays.  
131 GB Mirror and 836.50GB raid 5
The 131 GB datastore has 1MB blocksize and the 836.5 datastore has a 4MB blocksize.  
When I created the virtual disks it still limits me to 256GB even when i specify the larger datastore.  Is it because I have created the VM on the smaller store?
If so, how do i fix it?  Esxi is installed on the smaller mirror datastore so I dont think i can just blow it away and recreate it without starting over.  
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Top Expert 2009
Commented:
Have you tried creating the VM on the larger datastore from scratch? Try that and see if it works, 4MB can go up to 1TB in file size

Author

Commented:
i have a vm on the large partition that i just converted over too it from microsoft virtual server.  I will see if I can create a larger virtual disk tomorrow.
za_mkhIT Manager

Commented:
When you create the new disk ... it's asks if you want to store in the same location as the VM. If you say no to this, and explicity select your bigger data store, do you then get the option to go bigger than 255GB? A

Author

Commented:
za_mkh, right.  The VM is on the smaller 1Mb block datastore.  I explicitly choose the larger datastore, and it changed my virutal disk size automaticly down to 256GB.  
Ok my other VM was created on the larger datastore.  I shut it down, added a 400GB virutal disk with no problem.  So this leads me to believe where ever the VM is created, thats the block size it follows?
So can I just copy my VM to the other datastore and will it work?  

Author

Commented:
OK i moved my VM off the smaller store and blew it way  and recreated it with a 4 MB block.
I copied my VM back, added my virtual disks and now I can create larger virtual disks.  
So to answer the question, where ever the VM is created is how large the virtual disks can be.  Doesn't matter if the datastore has different block sizes.  
So it seems.

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