Mailinglist Archive: opensuse (626 mails)

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Re: [opensuse] Login weirdness
02.11.2018 20:40, Liam Proven пишет:

All hard drives have some bad sectors, it's true. Most develop more
during their operational life, also true.

But they have a pretty large reserved area(maybe 10-15%, it varies a lot
with model and makers don't like to disclose it. An >1% number of
blocks, anyway.) and failed blocks are replaced from the spare blocks.

This remapping is normal and invisible. The OS never knows there was a
read error, it's just switched on the fly.

There is no way to correct read errors without active OS involvement. OS
must reconstruct failed sector and re-write it; where should drive get
correct content to write into remapped sector if drive could not read
original sector in the first place?

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