On Wed, Sep 17, 2025 at 4:07 PM Go Canes <[email protected]> wrote:
> On Wed, Sep 17, 2025 at 12:30 PM home user via users > <[email protected]> wrote: > > If a block goes bad in a partition, does that permanently reduce the > > partition's space, or does the operating system (or drive) somehow > > compensate? > > Modern disk drives and SSDs usually have extra blocks that are used to > re-map bad blocks as they are detected. As long as there are still > blocks to perform the re-mapping you don't lose space. Once those > blocks are consumed I believe there are ways to manually tell the file > system that there are bad blocks and yes, that would then permanently > reduce the space. > > FWIW I have never had to deal with any of the above. In my experience > spinning drives fail before bad blocks become an issue. > One failure mode for spinning drives is a failure in the head movement controls that result in the head contacting the platter. A colleague at work had that happen to a drive with important files, so sent the drive to a data recovery outfit, who reported that the data was irretrievably gone. I have an old SSD that overheated and created a bunch of bad blocks that exhaoused the "reserve" space. After wiping and reformatting it is still usable. I'm using it to run F43 beta, but I don't trust it for things that need to be reliable. -- George N. White III
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