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The volume (DRIVE:) was not optimized because an error was encountered: Neither Slab Consolidation nor Slab Analysis will run if slabs are less than 8 MB. (0x8900002D)

This error appears in the event viewer when the scheduled task "ScheduledDefrag" runs.

Cause: In most cases this is cause by the -k switch which tells the defrager to perform a slab consolidation on the selected volume. This will cause an error for slabs that are less than 8 MB, and will commonly toss an error on HyperV VM's.

Solution: remove the -k switch from the task.

  • Open scheduled tasks, Microsoft, windows, defrag: "ScheduledDefrag"
  • Now click properties, actions, edit [start a program]
  • under add arguments(optional): remove the -k and click "ok", "ok"

That's it, your done.

Comments (2) -

  • Saladin

    5/12/2020 10:16:40 AM |

    Thank you for your answer to my question regarding the following:
    \The volume Data (DSmile was not optimized because an error was encountered: Neither Slab Consolidation nor Slab Analysis will run if slabs are less than 8 MB. (0x8900002D)

  • Matthew

    12/22/2020 7:27:14 PM |

    Exactly the error I was getting, thanks for the fix!

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