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I created my virtual machine hard drives with thin provisioning at the maximum of the block size (256gb for 1mb blocks) and then tried to snapshot them, failing with the error "file is larger than the maximum size supported". After researching, it appears maxing out the virtual HD prevents snapshotting (see http://kb.vmware.com/kb/1012384 or http://techbytes.wuz-up.com/2010/04/file-is-larger-than-maximum-size.html ) so I reduced the max size of my virtual HD to 250gb. However, the error continues to happen.

How can I get snapshots to work without rebuilding the virtual machine?

(And for curiosity, does the original HD size setting prevent the snapshot even now? or any insights into why this is dying?)

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How did you shrink the disk? Are you sure that it actually shrank? –  JakeRobinson Mar 2 '11 at 15:58

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