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Vmware cant format 2,7 tb DAS

Posted on 2010-01-11
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Last Modified: 2012-05-08
OS: ESXi 4.0 U1 (Free license)
System: Dell 2900, Perc5i
Disk: 8 x 750gb disks in raid 10 (DAS)

look at the controller it says the disk has 2,7 gb disk space. but when i try and create a datastore it will only allow me to use 740gb of the disk size.

Its like it cannot see the rest of the space. Anyone know what could be wrong here ? after its created i cant extend it, or create more datastores on the same disks. its like the system wont see more. i have a dell 2950 that sees more space without any problems (850gb).

I cant set the size manually either.

Thanks for any help you can provide! :)

Note: I do know that i cant format a disk above 2 tb. But thats what im trying to accomplish.
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Question by:Wraithbone
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10 Comments
 
LVL 24

Expert Comment

by:ryder0707
ID: 26281430
Max vmfs per volume is 2TB, try creating a smaller raid
If you want max, you need to create extent
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LVL 7

Author Comment

by:Wraithbone
ID: 26281437
as i just edited it to i know i can only get a 2 tb. but thats ok... the strange thing is i cant get it over 740gb. Normally i dont even have to change settings when i create the datastore, but here it says 740 giga.
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LVL 24

Expert Comment

by:ryder0707
ID: 26281446
yeah i saw similar problem before from past question, must be due to vmfs limitation
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LVL 7

Author Comment

by:Wraithbone
ID: 26281463
hmm.. can you explain what in the vmfs that does this ? we have loads of 2 tb LUN's on our cluster setup. and also single servers with 850gb vmfs partitions.

it all seems pretty strange to me as we have almost identical systems, that does not allow the same thing in vmware.
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LVL 24

Accepted Solution

by:
ryder0707 earned 2000 total points
ID: 26281496
i cant explain it myself, its stated in config max pdf by vmware
perhaps esx cant see the disk properly if too big or beyond 2TB
try raid10 500GB & 250GB, create 2 separate datastores, then create the extent
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LVL 7

Author Comment

by:Wraithbone
ID: 26281517
ok.. i will try to update the firmware on the controller first. if that does not work, i will create 2 luns, on the controller.

Thanks for the suggestion. i will return with more info soon! :)
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LVL 7

Author Comment

by:Wraithbone
ID: 26281545
ohh btw - that would be strange.. the limitations on disk size in vmware's documentation the disk size limit it 64tb on esx 3,5 U3.

documentation here: http://docs.google.com/viewer?a=v&q=cache%3AEc_CPeBZKwsJ%3Awww.vmware.com%2Fpdf%2Fvi3_35%2Fesx_3%2Fr35u2%2Fvi3_35_25_u2_config_max.pdf+vmware+esx+cannot+format+disk+of+2+tb&hl=da&gl=dk&sig=AHIEtbQGhZ0-Ks8mvTpZG5RYJ7QmeNSiKA&pli=1 

will still try your suggestion though. Doubt it would work. :-/
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LVL 24

Expert Comment

by:ryder0707
ID: 26281572
yeah 64TB based on 32 extents, each is 2TB
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LVL 7

Author Comment

by:Wraithbone
ID: 26281750
makeing 2 luns and then extending the datastore worked. seems vmware has some dislike to all disks above somewhere of 2 tb.

Thanks for the help!
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LVL 7

Author Closing Comment

by:Wraithbone
ID: 31675387
Worked...

Created 2 luns insted, and vmware didnt make any strange hickups anymore.
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