In practice, however, the physical block size information is spurious, at least for the first generation of Western Digital Advanced format drives.

但是在实践中，物理块大小信息是假的，至少对于第一代Western Digital Advanced Format驱动是这样的。

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It works with wifi and bluetooth, sending a signal to a physical block attached to the Lockitron owner's door.

CNN: Lockitron: The app that unlocked crowd-funding success

But cybercriminals using fast flux take advantage of the option to move the physical location of their malicious sites every few minutes, making them much harder to block or shut down.

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