On Sat, Jun 20, 2026 at 09:47:23PM -0700, David Christensen wrote: [...]
> That is also my understanding. The HDD's I own are proprietary, so the > engineering documentation is unavailable. But, I seem to recall reading an > article on the WWW stating that HDD's store additional data in hidden blocks > on the media to allow detecting and/or correcting several flipped bits. Much more than that. They do accept some error rate which is corrected (it has long been an engineering tradeoff: more density -> higher error rate -> better error correction codes): "For example, a typical 1 TB hard disk with 512-byte sectors provides additional capacity of about 93 GB for the ECC data." From: https://en.wikipedia.org/wiki/Hard_disk#Error_rates_and_handling Wikipedia: better than "the WWW". Especially in these times. Cheers -- t
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