How to change the blocksize of a VMFS filesystem
How to change the blocksize of a VMFS filesystem
By default, VMWare ESX server uses a 1M block size which limits you to having a maximum of 256GB in any single virtual machine. By changing the block size of your vmfs partition, you can increase the maximum amount of disk you can have. A 2M block size yields a maximum disk size of 512 GB, 4M yields 1TB, and 8M yields 2TB. There is no support for anything larger under vmfs3. Vmfs2 had a maximum block size of 16M, but that has been removed in the vmfs3 specification.
To change the block size of a vmfs filesystem, you need to use
vmkfstools to reformat the partition.
The command is: vmkfstools ‐‐createfs vmfs3 ‐‐blocksize 8M vmhba0
By default, VMWare ESX server uses a 1M block size which limits you to having a maximum of 256GB in any single virtual machine. By changing the block size of your vmfs partition, you can increase the maximum amount of disk you can have. A 2M block size yields a maximum disk size of 512 GB, 4M yields 1TB, and 8M yields 2TB. There is no support for anything larger under vmfs3. Vmfs2 had a maximum block size of 16M, but that has been removed in the vmfs3 specification.
To change the block size of a vmfs filesystem, you need to use
vmkfstools to reformat the partition.
The command is: vmkfstools ‐‐createfs vmfs3 ‐‐blocksize 8M vmhba0
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