VMware ESX Disk Configuration Options

VMware ESX offers several options for creating virtual disks (i.e., VMDK files) for your virtual machines (VMs). This article covers options for thin and thick VM disk provisioning, along with general recommendations and guidelines for storing VMDK files on ESX DAS and SANs. It’s especially important to consider the block size when formatting an ESX storage group; otherwise, you might have to back up any existing VMs and reformat the storage group. These disk configuration parameters have a significant effect on functionality, performance, and manageability.

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