# Slow scan speed?
**URL:** https://forum.syncthing.net/t/slow-scan-speed/8803
**Category:** Support
**Created:** [December 15, 2016, 9:49pm UTC](https://forum.syncthing.net/t/slow-scan-speed/8803 "2016-12-15T21:49:57Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@osker246](https://forum.syncthing.net/u/osker246)
#### Post date: [December 15, 2016, 9:49pm UTC](https://forum.syncthing.net/t/slow-scan-speed/8803/1 "2016-12-15T21:49:57Z")
So I am not sure if there is anything that could be done about this but I am trying to figure out why my folder scanning speed drops significantly. When I had first setup Syncthing on my unRAID server (i5-4460) and set up my first folder it had scanned roughly 4.5TB of data in about 8 hours. Later I had accidentally deleted my folder from the GUI after trying to setup some other stuff. Now adding this same folder says its going to take 3-4 days to scan. During my first scan my CPU usage ranged between 30-40% and now it sits at 2.1%. Why? Is this an unRAID or Syncthing issue? I’ve tried removing the docker container, clearing appdata and I have also deleted any hidden files/folders created by syncthing and nothing gets it back up to its original scan speed. Am I overlooking something here?
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### Author:  [@calmh](https://forum.syncthing.net/u/calmh)
#### Post date: [December 16, 2016, 8:40am UTC](https://forum.syncthing.net/t/slow-scan-speed/8803/2 "2016-12-16T08:40:45Z")
If the CPU load is not the bottle neck it is probably the read speed from the RAID thing, yes. Since it sounds like you’re on Linux, check `iostat -x 1` and the `svctm` and `%util` columns there. (Assuming it’s not a network mount.)
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### Author:  [@system](https://forum.syncthing.net/u/system)
#### Post date: [January 15, 2017, 8:55am UTC](https://forum.syncthing.net/t/slow-scan-speed/8803/3 "2017-01-15T08:55:49Z")
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