April 28, 20251 yr Sometimes file transfers work great on Unraid. Like if I'm transferring between 2 regular hard drives I can reach 200 MB/s, but most times it will start that way, then get reduced to 12 MB/s or lower. Sometimes under 1 MB/s and I don't know why. If I am doing a transfer between Unraid and Windows, usually it will stall so bad that I have to reboot the Unraid server uncleanly because it makes it so unbearable. For my setup, I have all the regular HDD's in a Mediasonic 8 bay DAS with 3.0 usb and plugged into a 5 gbps port in my m920q server. I have included diagnostics while I was using midnight commander and it started off at great rates, but fell to about 12 MB/s for the rest of the transfers. Hopefully someone can help me out. Thanks. server-diagnostics-20250427-0412.zip
April 28, 20251 yr >I have all the regular HDD's in a Mediasonic 8 bay DAS with 3.0 usb and plugged into a 5 gbps port in my m920q server. That's probably the issue. USB connected drivers are not recommended. Too many random issues like this.
April 28, 20251 yr Author 1 hour ago, MowMdown said: >I have all the regular HDD's in a Mediasonic 8 bay DAS with 3.0 usb and plugged into a 5 gbps port in my m920q server. That's probably the issue. USB connected drivers are not recommended. Too many random issues like this. Well that's shit... My m920q doesn't have esata so I can't connect it that way. And I just spent $400 on this stupid MediaSonic box that I can't return because people said a DAS would be fine... So many conflicting answers it's unreal.
April 28, 20251 yr 24 minutes ago, spike32 said: Well that's shit... My m920q doesn't have esata so I can't connect it that way. And I just spent $400 on this stupid MediaSonic box that I can't return because people said a DAS would be fine... So many conflicting answers it's unreal. I'm not claiming to be an expert but from my observations here is that USB connected drives whether that be in the form of a DAS or just an external drive, these connection methods are prone to issues like what you're experiencing. DAS are fine but typically people use things like specific PCIe HBA cards to connect them to their host and avoid using USB connections. I would wait for someone else to chime in. Someone with a USB connected DAS might chime in and contradict what im saying. Everybody has a different experience with these things. Edited April 28, 20251 yr by MowMdown
April 29, 20251 yr Diags show writes to disk2 at around 6MB/s, which is very slow, is it the same if you write to a different disk? Also, worth running the diskspeed container tests, both for disks and controller.
April 29, 20251 yr Author 3 hours ago, JorgeB said: Diags show writes to disk2 at around 6MB/s, which is very slow, is it the same if you write to a different disk? Also, worth running the diskspeed container tests, both for disks and controller. Here is the diskspeed of the 2 disks. It does not give me any disk speed for the usb controller. I'm not sure about writing it to a different disk, I just wrote it to the /mnt/user directory. I can definitely try to write it to another individual drive and see what happens. Drive ID: sda (nvme) Vendor: SSDPEMKF Model: 256G8 NVMe I Serial Number: DD56419883B1F Revision: 0 Capacity: 256GB Logical/Physical Sector Size: 512/4096 Drive ID: sdh (Disk 2) Vendor: Seagate Model: ST14000NM0121 Serial Number: ZKL2SDQ7 Revision: SN01 Capacity: 14TB RPM: 7200 Signaling Speed: 6.0Gb/s Logical/Physical Sector Size: 512/4096 Multiple Sector Transfer: 16 (Current & Max)
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