Rad write speed slow

[pyrofighting]

I am using Drivepool on three computers. On one computer, I am getting 30-40mb/s when transferring files. On the other two, I get 250-350mb/s transfer speeds. I am unable to figure out the bottleneck.

I am using 10 WD Purple 18tb for the Drivepool on all three computers. The computers are all within two years old with i7 and i9 cpu and 64gb of ram. I am transferring from the Drivepool to an External WD Red Pro 18tb. I have tried transferring to a NVME in the same PC but get the same low write speeds. All disks are healthy. Any suggestions of cause?

[Shane]

I've read of some USB3 connections failing back to USB2 because {various reasons}, so I'd suggest looking into that if any of the involved drives on the slow computer are connected via USB... except I'm getting the feeling that might not be the case when you mention the NVME transfer?

Other things to look at on the slow computer include file size (transfers of lots of little files will have poor averaged speeds), cpu/io load, antivirus interference, windows search indexing interference, performance/power options, bad cables.

Do you get the same low speeds when transferring the same files directly from each of the individual physical disks to the external disk or only from the pool to the external disk?

[pyrofighting]

The drives are connected via NVME to Sata adapter to the motherboard. That does not appear to be the bottleneck. I have tried Drivepool to NVME and Drivepool to external HDD. Both with the same results of low read/ write speeds. It doesn’t matter if Im transferring four files or 400 files, same speeds.

[Shane]

Does transferring files directly from any of the individual disks in the pool to the external hdd experience the same slowdown?

[pyrofighting]

4 hours ago, Shane said:

Does transferring files directly from any of the individual disks in the pool to the external hdd experience the same slowdown?

Usually yes. I have got higher speeds on the other two but it appears with this particular pool, 35mb/s is my max. All drives show healthy and good temps. 

[Shane]

Is that machine a different motherboard to the other two machines? Any differences in BIOS/UEFI configuration or drivers?

[pyrofighting]

20 hours ago, Shane said:

Is that machine a different motherboard to the other two machines? Any differences in BIOS/UEFI configuration or drivers?

Yes. It’s an asus MB, the others are MSI. But the asus is the highest end board of the three. 

[Shane]

I'd try (re)installing the latest drivers for the board, particularly any related to chipset/storage. Also check its BIOS for any storage-related settings that might be relevant.

[pyrofighting]

Yes, I think firmware may be my issue. Ill be able to shut the cameras down tomorrow since we are closed and run some updates!