> On Aug 16, 2016, at 10:02 AM, Pen Helm <[email protected]> wrote:
> 
> I thought the hard drive's firmware mapped out the bad blocks invisibly, and 
> if you seeing bad blocks on the drive, it means the drive has already used up 
> all its spare blocks and is failing.  True?

My understanding is the SMART tests built into modern drives map out bad 
blocks. Every hard drive has a number of extra blocks it uses to replace bad 
ones. It gives a SMART error when the supply of spare blocks is depleted.

L^2


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