The -f (force) option

You can use the -f option of onspaces to drop an sbspace chunk without metadata allocated in it. If the chunk contains metadata for the sbspace, you must drop the entire sbspace. Use the Chunks section of onstat -d to determine which sbspace chunks contain metadata.
onspaces -d sbsp3 -f
Warning: If you force the drop of an sbspace, you might introduce consistency problems between tables and sbspaces.

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