How to convert preallocated disks to thin provisioned disks?

Solution Verified - Updated 2025-10-08T01:13:08+00:00 -

English

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Environment

• Red Hat Virtualization 4

Issue

• How to convert preallocated disks to thin provisioned disks?
• Is there an option in RHEV-M GUI to convert preallocated disks to thin provisioned disks?

Resolution

• While not possible to convert prealloc to thin-provisioned via the GUI, it is possible using the API - the steps can be found in Solution 7075778

Root Cause

This functionality was added in bugzilla 977778

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