Configure VMFS volume block size to 8 MB

One of the mundane tasks of administering a VMware vSphere installation is formatting a virtual machine file system (VMFS) datastore. The block size is an option that can make a big difference in the formatting process.

The VMFS block size can be 1 MB, 2 MB, 4 MB, or 8 MB and is selected only during the format phase. The 1 MB block size allows a maximum virtual machine disk file (VMDK) of 256 GB; the 2 MB block size allows a maximum VMDK of 512 GB; the 4 MB allows a maximum VMDK of 1024 GB; and the 8 MB block allows a maximum VMDK of 2 TB.

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Read the entire post at TechRepublic.

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