On Sat, Nov 24, 2018 at 7:08 AM Tim via users <users@lists.fedoraproject.org>
wrote:

> Allegedly, on or about 23 November 2018, Richard Shaw sent:
> > I did a little research last time (I believe it was you) it was
> > mentioned and while there are a lot of opinions the google consensus
> > I found was that they already reserve some space from the factory but
> > that reserving an additional 15% was sufficient to allow the wear
> > leveling algorithms to work efficiently.
>
> Isn't wear levelling just going to reduce the drive capacity from you
> anyway?  Whether it takes it from your pre-allocated space or
> unallocated left-overs.
>

Yes, it's just how much more do you think is needed to keep the drive
performance up, specifically write performance.

My understanding is that writing to and empty block is very fast, but if
you're writing over a used block it has to erase it first which is an
expensive operation time wise. Reserving some block (be it by the
manufacturer or just not allocating everything) keeps more erased blocks
available.

Having just written that it makes me thing you should reserve more space if
you're doing a lot of writes and perhaps less space if you're not.

Thanks,
Richard
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