Como alterar o tamanho dos blocos dos volumes no VMware ESXI

How do I change the block size ESXi

I just recently needed to change the block size of my ESXi installation so that I could utilize a larger-sized virtual machine. Since the bulk of a virtual machine is stored as a single file, the block-size imposes limitations on how big the machine can be, as follows:


Block Size / Max VM Size

1 / 256 GB
2 / 512 GB
4 / 1024 GB
8 / 2048 GB

With ESXi you cannot change this during the install, but you can create a new volume afterwards to replace the datastore that is made with installation.

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***** CAUTION: following the steps below WILL remove all data in the existing datastore.
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First, log into your VMware Infrastructure client. Highlight the virtual host from the left pane (should be the only thing there, since this is a fresh install). Go to the configuration tab, and select "Storage" under the Hardware heading. To the right you will see your datastore, and a column labelled "device." Record the data from this column (mine was vmhba1:0:0:3). You will need this later.

• 1) At the VMware console (where you see the machine's IP) press Alt - F1 to get to a new console window with some log information.

• 2) Type "unsupported" (no quotes) and hit enter. You will not see the characters as you type them

• 3) Enter the "root" password -- you are now at a commandline

• 4) enter the following command: vmkfstools --createfs vmfs3 --blocksize 8M vmhba1:0:0:3

• Replace the blocksize parameter with whatever you need (I used 2M, to get virtual machines up to 500ish gigs). Replace the vmhba1:0:0:3 with the name that you recorded earlier. All set!