Failed Disk Data Exposure

Here's a Friday topic: With modern disk arrays, e.g. DS8000, what is the real exposure of meaningful residual data being recovered from a single drive out of the array. I can't seem to find anything definitive other than a lot of "data may be recoverable" statements from vendors selling secure erase services. Just curious if anybody has any hard data to demonstrate an exposure or not.

Donald Grinsell
State of Montana
"Any fool can write code that a computer can understand. Good programmers write code that humans can understand." ~ Martin Fowler

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