Hi, I would like to pick up from a few old threads: Especially: https://forum.slysoft.com/showthrea...esults-vs-my-old-computer-with-faster-results Also: https://forum.slysoft.com/showthread.php?58505-Slow-writhing-time-to-iso&highlight=iso+writing+slow https://forum.slysoft.com/showthrea...time-to-rip-to-ISO&highlight=iso+writing+slow Here's what happened to me: I copied my windows installation from a 250GB Seagte HD via gparted to a 1TB Seagate HD. Everything else hasn't changed. I expected things to be a bit faster, but in daily work it feels the same. Now here's the big ouch: doing a DVD copy with CloneDVD2 took ~10mins for ripping a DVD to HD, then another 2mins to create the ISO (to an external USB3 drive). With the new drive, the ripping takes same amount of time, but creating the ISO would take like 30 minutes! I watched the process in perfmon and I could see that doing manual file copies in an explorer window would do ~100MB/s, sometimes 150, and the IO size would be anywhere from 1 to 4 Megabytes. During the CloneDVD copy process the IO size would permanently stick to 32 kilobytes, and due to the fact that a normal HD can do no more than around 100-120 IOPS, the reulting transfer speed is 3MB/s, ergo half an hour or more for 5-6 GB. The allocation size of the NTFS is the same for both HDs, 4kB. Any specific reason why CloneDVD would suddenly want to stick to 32 kilobytes?