Linked by Thom Holwerda on Thu 27th Sep 2012 19:36 UTC
Apple I bought a brand new iMac on Tuesday. I'm pretty sure this will come as a surprise to some, so I figured I might as well offer some background information about this choice - maybe it'll help other people who are also pondering what to buy as their next computer.
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Yea, my geeky curiosity couldn't justify that experiment.

Well, I am waiting for my turn to win the lottery.. I did actually win 16.80 euro last night! ;) Not enough to buy two dozen SSDs just to burn through them in the name of science but, hey, you never know.

"Donor disks" are useful for another purpose: reverse engineering the encoding/mapping algorithms used by a particular controller, which is immensely helpful in reconstructing sector data from a raw flash dump in a data recovery scenario.

But instead of talking about it I'll just drop this link.

That's actually really nothing new to me. I follow SSD-related news every now and then and most of the stuff discussed here doesn't really apply to SSDs: SSDs by design use commonly-accessible NAND-chips, but the actual controllers are always proprietary and often only accessible to 1-3 manufacturers. As such the NAND-chips aren't physically paired with the controller and recovering the chips is straight-forward.

Now, even though recovering the chips is straight-forward there are two hurdles to overcome if you want to recover the data on said NANDs, and these hurdles are: 1) Compression -- most controllers these days do compression of data in order to minimize actual writes to the chips and thereby provide longer lifespan. 2) Encryption -- most controllers also employ encryption of data exactly because recovering the chips themselves is easy. Old SSDs didn't employ encryption, but it's a standard feature nowadays and cannot be disabled. The encryption-scheme is obviously not documented anywhere and is only accessible via NDA and the keys used are unique, they are not shared even by drives from the same batch.

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