On Sat, Nov 24, 2018 at 7:08 AM Tim via users <users@xxxxxxxxxxxxxxxxxxxxxxx> 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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