VMware Certified Professional - Data Center Virtualization (VCP-DCV) Practice Exam

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What scenario could lead to Storage DRS being disabled on a virtual disk (VMDK)?

  1. The VMDK is hosted on NFS storage

  2. The virtual machine has a CD-ROM/ISO image connected

  3. The VMDK is an independent disk

  4. The virtual machine has vSphere Fault Tolerance enabled

The correct answer is: The VMDK is an independent disk

Storage DRS (Distributed Resource Scheduler) is designed to automate the management of storage resources for virtual machines by balancing storage workloads and providing load balancing. However, there are specific scenarios where Storage DRS can be disabled for a virtual disk, one of which is when the VMDK is designated as an independent disk. Independent disks are used in scenarios where you want specific behavior regarding snapshots and replication. When you set a disk as independent, it is excluded from the normal operations of snapshot management, which impacts how storage optimizations are handled. Since Storage DRS relies heavily on being able to take snapshots to manage and migrate data efficiently, independent disks pose a challenge to this functionality. As such, when a VMDK is marked as an independent disk, Storage DRS cannot manage it, thereby disabling its features for that particular disk. The other scenarios, such as VMDKs being hosted on NFS storage, having a CD-ROM or ISO image connected, or having vSphere Fault Tolerance enabled, do not inherently prevent the use of Storage DRS. These configurations allow for the flexible management of storage resources and don't interfere with the functionalities that Storage DRS provides to virtual disks, unlike the specific limitation imposed by independent disks.

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