November 12, 2025Nov 12 I've been using Unraid for five years now, and I've always experienced slower transfer speeds and video buffering, but it seems more common lately, and I'm trying to find a solution. I've read that not maintaining 15% +/- free space on HDDs can cause bandwidth issues, and I usually keep mine pretty full, with only 100GB +/- free. Any time I transfer files to or from my Unraid server to my PC, I get the sawtooth pattern, which reaches speeds of up to 80 Mbps or less and then drops back down to 0 Mbps, repeating over and over. I've had this issue with multiple PCs and networking equipment, so if it's a hardware issue, it would likely be limited to the Unraid server hardware.I've attached my diagnostics. Are my drives too full, causing this issue, or is it something else? tower-diagnostics-20251112-0923.zip
November 12, 2025Nov 12 Community Expert Based on the screenshot, you appear to be copying from the array to the array, or is this over SMB?
November 12, 2025Nov 12 Author 1 minute ago, JorgeB said:Based on the screenshot, you appear to be copying from the array to the array, or is this over SMB?This is a screenshot from my PC, transferring files from the array to my PC via a network share.
November 12, 2025Nov 12 Community Expert Just FYI, in case you're not aware, you can use Windows Explorer to move files locally on the server; they won't be transferred over the LAN.The diags show files being written to and read from multiple disks. This is not a good test. Stop all other array activity, transfer a large file, and post new diags.
November 12, 2025Nov 12 Author 56 minutes ago, JorgeB said:Just FYI, in case you're not aware, you can use Windows Explorer to move files locally on the server; they won't be transferred over the LAN.The diags show files being written to and read from multiple disks. This is not a good test. Stop all other array activity, transfer a large file, and post new diags.That screenshot shows me moving a TV show to my PC from the array so that I can watch the file locally, avoiding lag.New log attached.I may have figured out what the issue is, as I just tried moving a file from the array to my PC, and it was at a steady 110 Mbps. I use Blue Iris security camera software, and it stores videos on my Unraid server in real-time. I moved the storage to my PC's local storage, and now Blue Iris is working significantly better, and Unraid seems to be working better as well. I didn't think using the Unraid server would be an issue, though, since my cache drive is an SSD, and I would think the write speed would be more than enough. Do you know if the cache write speed is limited or if there is a setting I might have missed? Thanks tower-diagnostics-20251112-1256.zip
November 12, 2025Nov 12 Community Expert Just now, kjac said:Do you know if the cache write speed is limited or if there is a setting I might have missed?It's typically limited by the device I/O speed; there's no "Unraid" limit.
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