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Re: disk was changing from thin to thick after detach and attach the disk back.

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> I want to mention that the disk is full capacity.
> I just wondering what is the option that VMware can change the disk from thin to thick.
If you fill a vmdk until its full nominal size it automatically turns into an eager zeroed thick.
The parameter
ddb.thinProvisioned =
provides info for the GUI-functions.
Effectively thin can change to thick without some GUI-function setting this switch.
Same applies to  the other way round.
To shrink a vmdk use the punchzero functions or do a vmkfstools -i clone.


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