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If the client spends this time uselessly waiting, your transfer speed will be low. When transferring, the SFTP client (WinSCP) sends a read/write request to the SFTP server, waits for a response and repeats, until the end of the file.Įven if your connection is fast, if the server is far away (or slow), it takes a time for the response to arrive back. It is able to maintain a good speed in the 130-140 range before dropping down to 35MB/s.Network delay/latency affects particularly SFTP, as it is a packet oriented-protocol. This *could* be due to parity-related CPU usage, which I can see spike pretty quickly after starting a transfer. Transfers to the SS array are the slowest. #WINDOWS 10 FILE COPY FAST THEN SLOWS DOWN WINDOWS 10#But since installing Windows 10 (clean install), it sucks terribly. I typically get around 150MB/s read speeds from it, and only slightly lower for write speeds. From a spinning disk to a 5TB x 3 Storage Spaces array (in parity mode), it'll start off fast, then drop to 35MB/s or soīy biggest concern right now is the horrible read speed I'm getting from my external RAID5 array, which is composed of five 2TB WD Red drives, connected to the PC with a RocketRAID 2314 card that supports port multiplication. From one spinning disk to another, an 18GB transfer started at a solid 160MB/s, then dropped to 130MB/s until it was done From my 4TB WD USB 3.0 drive to my 5TB Seagate USB 3.0 drive, I got 150MB/s From my RAID array to the USB drive now, I got a speed that fluctuated between 50-80MB/s I at least having seen the 8-9MB/s transfer again. Sometimes things go fast, sometimes they crawl. I also double-checked that all the write-caching options were enabled (they were).Īfter all that, things changed a little. I already had the newest RocketRAID drivers. #WINDOWS 10 FILE COPY FAST THEN SLOWS DOWN DRIVERS#so I had to change the hardware controller and hub within the drivers manually. #WINDOWS 10 FILE COPY FAST THEN SLOWS DOWN INSTALL#I say "painstakingly" because I was able to determine the AMD chipset installer did not install over the older Microsoft USB 3.0 drivers. I went through an painstakingly updated all the drivers. At first, I thought maybe it was an issue with USB, but further testing showed it was happening across all drives in the system (one SSD, two spinning disks, the two USB 3.0 drives, and the external eSATA RAID array). It would start out around 100MB/s, but then drop to 8-9 MB/s until I canceled the transfer. I am trying to copy roughly 2.5TB of movies from a five disk RAID5 array in a port-multiplier enclosure (via a RocketRAID 2314 card) to a 4TB Seagate USB 3.0 external drive. I'm having the same issues, though not consistently. I registered just to add to, and follow this thread. Has anyone encountered this problem after a clean install? ![]() I'm really tempted to do a clean install of the OS. Now that the desktop secondary drive is on a different port set, it has nearly the same throughput as the laptop secondary drive. I also have an HP laptop with a WD secondary drive and an 840Pro OS drive. I'll have to research the symptoms a bit more before I get a good idea as to what is really going on. #WINDOWS 10 FILE COPY FAST THEN SLOWS DOWN DRIVER#Something is definitely holding it back, and it's tied to Windows 10 and the particular upgrade path and/or the driver set being used. Just for giggles I turned the Marvell controller on (never has been reliable on my board) and tested throughput. The secondary shares the 3Gb/s with a blu-ray drive: After using the Magician benchmark tool quite a bit today, the results seem a little too random to be reliable. The OS SSD is now the only drive on the Intel 6Gb/s port(s) it had slight gains on IOPS (not worth showing). It isn't near what it should be, but it's serviceable. Welp, I was wrong, changing the port had a drastic effect. Keep in mind that this is with Rapid Mode enabled, and I had to use the 4.4-4.7 method of installation/update to get it working, so it might not be connected at all. It might also be worth noting that my SSD IOPS has been chopped nearly in half since the upgrade: After that I'm ready to just wipe the drive and do a clean install. My next move is to switch cables and move the drive to another SATA port, but I doubt it will make any difference. The chipset drivers have been updated with the latest Intel has to no effect. At the very least the results should be comparable, but they are not even close: #WINDOWS 10 FILE COPY FAST THEN SLOWS DOWN SOFTWARE#I searched for more comprehensive testing software and tripped over a thread of someone using the same model HDD. It went through a ~13 hour diagnostic with the manufacturer utility software and came out flying colors. The WD 2TB drive that is averaging 13MB/s on read and 70MB/s on write with Crystal Disk Mark. Since the OS drive is an SSD I have quite a lot of programs using both drives and it's really been interfering with my productivity. 8 second to 2 minute startup, one or the other at random. ![]()
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