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How secure WAFL really is?

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Hi, 

My question may sound like I'm a newbie, but I'll ask it anyway. 

 

Suppose a 100 GB thin Flexvol sits on an aggregate to serve as an iSCSI volume (VolumeA). 10% of this volume is occupied with user files and snapshots. A sysadmin deletes the volume. The next day, another volume is created on the same aggregate (VolumeB) and presented as an iSCSI LUN to a new Linux server. A clever Linux guy wants to peek a the volume at the first few blocks of the LUN using DD or some other similar techniques. 

 

What are the chances that OnTap will return a block that was previously used by the first volume that was deleted?

 

(suppose there is no encryption in use in that system). 

 

Thank you for educating me!


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