Vmware esxi 6.7 hdd support7/18/2023 Multi-writer is also used for VMWare Fault Tolerance when primary and standby virtual machines access a shared vmdk file simultaneously. The Multi-Writer option ensures that a guest host clustering application (such as Oracle RAC or Microsoft MSCS) doesn’t cause data loss when accessing from two or more virtual machines. This feature is called Multi-writer VMDK. However, there is a VMware technology that allows sharing VMFS-backed disks between several VMs. This prevent VMs from accessing other virtual machines disks, and avoid data corruption or loss. vmdk file simultaneously (locks are used). By default VMFS, NFS datastores, vSAN are not allowing multiple virtual machines to access the same. VMware VMFS is a clustered file system shared between multiple ESXi hosts.
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