December 2017
Beginner
598 pages
14h 7m
English
Content preview from Mastering VMware vSphere 6.5
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Virtual disks
A virtual disk stores the actual VM data and the VM can be configured to use a new disk, attach an existing disk, or map SAN LUN. A LUN to a VMFS map is referred to as a Raw Device Mapping (RDM) that points to the raw LUN. In this case, the .vmdk file (.vmdk files will be discussed later in the file structure) doesn't store data (data is stored on the LUN) but it contains only the mapping to the LUN disk information.
Virtual disks can be moved across different datastores connected to the host on which the VM runs. When a new disk is created, it can be provisioned in three different formats depending on the requirements:
- Thick provision lazy zeroed: The default format; space on the datastore is allocated when the VM is created ...
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