Which disk type will always be created for each virtual machine, when creating new virtual machines using Machine Creation Services (MCS)?

Question

Options

• APersonal vDisk
• BDifferencing (Diff) disk
• CIdentity disk
• DFull-clone base disk

• B
  5% (2)
• C
  93% (41)
• D
  2% (1)

Explanation

When Citrix Machine Creation Services provisions a virtual machine, it always creates an Identity disk - a small disk (typically ~16 MB) that stores the unique computer account information for that VM, including its machine name and SID, allowing each clone to have a distinct identity on the domain even though all VMs share the same master image.

Why the distractors are wrong:

• A (Personal vDisk): PvD was an optional, legacy Citrix feature for storing user-installed apps; it was never a mandatory MCS component and has since been deprecated.
• B (Differencing disk): While MCS does use differencing/delta disks in linked-clone scenarios, this is not universally created across all MCS deployment types (e.g., full-clone pools don't use one the same way).
• D (Full-clone base disk): Full clones are one provisioning option within MCS, not something created for every VM by default - doing so would defeat the storage-efficiency purpose of MCS.

Memory tip: Think "every VM needs an ID card to exist on the network" - the Identity disk is that card, making it the one disk MCS always creates, no matter the deployment type.

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