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gtg
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Maximum Supported LUN Size

What's the biggest supported LUN size on ESX 3 ?

I initially created a 5TB LUN - but ESX failed to see that. Once I shrank it down to 1TB, ESX saw it fine.

Does ESX suffer from the MS-DOS 2TB partition size limit ?

Thanks,

GTG

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ErMaC1
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The block size does not change how large a volume you can have. The block size changes how large a file[/b] you can have in that volume.

ESX only supports LUNs of 2TB. If you make a LUN greater than 2TB, as you've seen, you will not be able to format it or even see it with ESX.

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MR-T
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This is what you need:

It does depend on your block size.

http://www.vmware.com/pdf/vi3_301_201_config_max.pdf

gtg
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That implies that my 5TB LUN should have been seen without any problems as ESX3 supports a tad under 16TB at a worst case.

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gogogo5
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A LUN can be any size but its the size of your VMFS volumes that sit on that LUN that has the limits. So you could have a 4TB LUN and create 2 x 2TB VMFS volumes on it (though its more common to create 2 x 2TB LUNs and fill each LUN with a single VMFS volume).

Then the VMFS volume has files on it which again have limits. The maximum file size on VMFS3 is 2TB.

Therefore, if you had shrank your VMFS volume down to 2TB instead of 1TB then technically ESX would be able to see it.

You can also have extents too which span multiple VMFS volumes up to 64TB (though this is dependent on your block size as mentioned already).

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ErMaC1
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The block size does not change how large a volume you can have. The block size changes how large a file[/b] you can have in that volume.

ESX only supports LUNs of 2TB. If you make a LUN greater than 2TB, as you've seen, you will not be able to format it or even see it with ESX.

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admin
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The maximum size LUN an ESX server can 'see' is 2TB, this goes for VMFS or RDM. You can make VMFS volumes larger by adding multiple 2TB LUNs together with extents, but the maximum file size on that VMFS volume is still 2TB.

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gtg
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ESX only supports LUNs of 2TB. If you make a LUN

greater than 2TB, as you've seen, you will not be

able to format it or even see it with ESX.

I never thought I'd see the day when I complained that I can only have a 2TB partition...

GTG

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MR-T
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Man, talk about quick posters.

Sorry I should have said 2TB before.

I nipped away from my desk for a minute and everyone's here.

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gogogo5
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DOH - and I just realised I contradicted myself in my own post!! Smiley Happy

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