Scenario: A Citrix Engineer needs to deploy static desktops with Personal vDisk for the head office staff. The engineer implements a catalog named Windows8-PvD with Personal vDisk enabled and uses…

Luis F.Nov 10, 2025

A and B are the right picks here. The registry key PercentOfPvDForApps set to 80 on the master image is exactly how you tell Personal vDisk to carve out 80% of its space for application data, which automatically leaves the remaining 20% for user profile data, so that part of the requirement is handled in one shot. Then EnableUserProfileRedirection set to 0 disables the built-in profile redirection that Personal vDisk would normally do, which is what you want since Citrix Roaming Profile Management is already handling that job and you do not want both systems fighting over the same profile data. C and E are about broker desktop group buffer sizing, which is totally unrelated to PvD storage allocation, and D is about dynamic resizing which is a different feature entirely. Hope this clears it up for anyone who was second-guessing between A and D like I was at first.

Giovanna H.Oct 28, 2025

This question maps to the 1Y0-301 blueprint section on configuring Machine Catalogs with Personal vDisk, so treat it as core PvD administration knowledge. The mnemonic I use with students is PAIR, meaning Profile And Inventory Ratio, because PvD configuration always involves two separate concerns, where to put profile data and how to split the disk space. For the profile question, EnableUserProfileRedirection set to 0 on the master image tells PvD to leave profile management entirely to whatever external solution is in place, which in this scenario is Citrix Roaming Profile Management, so B is correct. For the ratio question, PercentOfPvDForApps set to 80 on the master image directly controls that 80/20 split between the application container and the user data container, so A is correct. Options C and E are distractors using Set-BrokerDesktopGroup parameters that control peak and off-peak VM buffer counts, which have nothing to do with disk allocation inside PvD. Here is my clarifying question for the group: when EnableUserProfileRedirection is set to 1 instead of 0, meaning PvD does handle profile storage, does the 20 percent allocated to user data via PercentOfPvDForApps then house both the redirected profile and any other user-generated data, or does PvD treat those as separate containers within that same 20 percent slice? Getting that boundary clear will help you avoid confusing the two registry keys on exam day.

Viktor S.Nov 7, 2025

I kept looking at C thinking the PowerShell cmdlet had something to do with it since "80" was right there in the command, but that flag controls buffer size for load management, not PvD disk allocation at all. Once I actually looked up what PercentOfPvDForApps and EnableUserProfileRedirection do on the master image registry, it was obvious those two registry keys are exactly what controls the split ratio and whether profile data gets written to PvD in the first place.

Thekla S.Nov 20, 2025

Thought C looked right until I remembered profile redirection lives in the registry, not broker cmdlets.

Bao N.Nov 25, 2025

Took this one on my third full practice run and it tripped me up the first time because I went for C thinking it was about buffer allocation, which is a totally different thing that controls how many desktops stay pre-launched, not how the PvD storage is split. The two registry keys on the master image are the actual levers here. PercentOfPvDForApps set to 80 tells the PvD driver exactly how to slice the virtual disk, and EnableUserProfileRedirection set to 0 is what tells PvD to back off from storing profile data since you already have Citrix Profile Management handling that. When I sat the real 1Y0-301 I flagged this one, came back to it, and once I reminded myself that the buffer size PowerShell commands are Delivery Controller broker settings for session pre-launch and have nothing to do with PvD storage ratios, A and B locked in clean.