# Making use of added storage volumes **URL:** \ **Category:** Self-hosting\ **Tags:** hosting\ **Created:** [Outubro 4, 2016, 8:48am UTC](https://meta.discourse.org/t/making-use-of-added-storage-volumes/51060 "2016-10-04T08:48:57Z")\ **Posts on this page:** 1\ **Showing post:** 11
**Author:** ![michaeld](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/michaeld/32/1594_2.png) [@michaeld](https://meta.discourse.org/u/michaeld)\ **Post date:** [Agosto 25, 2017, 1:09pm UTC](https://meta.discourse.org/t/making-use-of-added-storage-volumes/51060/11 "2017-08-25T13:09:52Z")
The difference is much worse. `dd` is not a good tool to measure performance if you want the results to be anything near what is happening in real life. `dd` performs a long sequential write, and that is not what your Discourse server is doing. We use `fio` for benchmarking stuff like this. See this article: [https://www.binarylane.com.au/support/solutions/articles/1000055889-how-to-benchmark-disk-i-o](https://www.binarylane.com.au/support/solutions/articles/1000055889-how-to-benchmark-disk-i-o) The base SSD disk is around 9 times faster than the add-on volume. Base disk: ``` Jobs: 1 (f=1): [m] [-.-% done] [115.8M/39880K /s] [29.7K/9970 iops] [eta 00m:00s] READ: io=307668KB, aggrb=127346KB/s, minb=127346KB/s, maxb=127346KB/s, mint=2416msec, maxt=2416msec WRITE: io=101932KB, aggrb=42190KB/s, minb=42190KB/s, maxb=42190KB/s, mint=2416msec, maxt=2416msec ``` Add-on volume: ``` Jobs: 1 (f=1): [m] [100.0% done] [11484K/3904K /s] [2871 /976 iops] [eta 00m:00s] READ: io=306676KB, aggrb=14174KB/s, minb=14174KB/s, maxb=14174KB/s, mint=21635msec, maxt=21635msec WRITE: io=102924KB, aggrb=4757KB/s, minb=4757KB/s, maxb=4757KB/s, mint=21635msec, maxt=21635msec ``` On the other hand, don’t overestimate the impact of a not so fast disk: if you use the add on disk only for files (`public/uploads` ) then nginx caching and kernel filesystem caching will save your day and you’ll still have a pretty decent performance. --- _[View the full topic](https://meta.discourse.org/t/making-use-of-added-storage-volumes/51060)._