2) Go to Storage Pool 1. 3) Select "Global Settings" button at the top. 4) Adjust the "RAID Resync Speed Limits". See the note: "This setting will affect the speed limit when running data scrubbing, repairing, expanding storage pools, and changing RAID types." This looks as though it only lets you change the speed_limit_min and speed_limit_max values, but not the stripe_cache_size variable. Still, it'll be nice to be able to set this in DSM and not worry so much about it anymore. Is there any data on what the "Run RAID resync faster" radio button actually changes? what are the max speed limits for the custom RAID Resync Speed Limits? Whats a good way to test these out? How would I notice the I have gone over the edge? BakeCityWay • 3 yr. ago Impact is referring to your overall NAS performance. Everything will b slow when you run the resync faster or you can choose to have a slower rebuild but better performance while you use the NAS. r/synology News, discussion, and community support for Synology devices A community to discuss Synology NAS and networking devices Finding the Problem Fixing the Problem (Temporarily) Improving Performance Inspecting a setup -- do this first if you're new to the hardware you're working on! Links https://www.simplicate.info/2014/05/07/speeding-up-synology-volume-expansion/ Gist by @stevenharman 1 Likes Hi everyone, I have a DS916+ running DSM 7.0. I just spend almost 24h for data scrubbing to run on the new 2x 18tb drives in Raid1 with no data on them. While this was happening the CPU was at 0% all the time and I was not doing anything else on the NAS. The process is just as slow on another identical NAS running DSM6 .

synology raid resync speed limits