# Raid 5

## Performance du raid5

On peut améliorer la vitesse d'écriture sur le raid 5 en lui allouant plus de ram:

```
echo 32768 > /sys/block/md126/md/stripe_cache_size
```
[![](https://wiki.ppsfleet.navy/uploads/images/gallery/2020-12/scaled-1680-/image-1607979706900.png)](https://wiki.ppsfleet.navy/uploads/images/gallery/2020-12/image-1607979706900.png)

### source:

* https://lucatnt.com/2013/06/improve-software-raid-speed-on-linux/

* https://mannygonzalez.blogspot.com/2015/02/speeding-up-raid-operations-on-synology.html