If I copy a large amount of data from on drive to another (physical) drive my whole system is running slow.
I am using Windows 7 64bit version on an Intel Core 2 Duo 3 GHz.
This is the situation:
- Very fast copying between two SATA disks.
- Resource Monitor shows 80MB/s read, 70MB/s writes and 150MB/s total
- The total CPU load is about 3%
- There is plenty (>2GB) of free physical RAM left
- All partitions have enough (>10gb, >10%) of free space left and show low fragmentation
- Anti-Virus software is not active
This is the problem: No matter what I want to do while copying, it takes forever. Even tasks that do not need a lot of disk access (as they should work from RAM only), are extremely slow. The moment I stop the copying process, all the unfinished tasks finish at once. For example trying to open a new browser windows or explorer window will not work. If the copying is stopped 5 explorer windows popup at once.
My question is: why? What resource is exhausted, if CPU and memory are idle? And what part of my computer hardware I need to upgrade to get better behavior? Also read Psycogeek's comment for further questions in this direction.
If your answer is, that everything needs HDD Access, which is blocked by such an activity, then my question is: Is there a way to copy something on your system without rendering it unusable until its done? (which can be hours, if >500g have to be copied).