The PC's basic HW/SW profile is as follows: It was recently custom built using an Intel Extreme DP55KG motherboard and a Core i5 CPU. It has 4 GBs of DDR3 memory, a 500-GB HD by WD and a 16x DVD drive by HP. Both drives are in the SATA format. The OS used is the 64-bit Windows 7 Ultimate. Essentially, a 64-bit PC running a 64-bit OS.
Given all the excitement surrounding the migration from Windows XP to Windows 7 and especially going from the 32-bit operating system and the CPU to the 64-bit versions, I find the read, write and copying speeds of Windows 7 quite disappointing. In short, I have found the data transfer rates, regardless of the medium used, to be lousy. I hope, after this post, someone can point me in the right direction so I might find out why my new 64-bit Windows 7 PC is many times slower than my older 32-bit Windows XP PC.
To test the new PC's performance, I copied a 2-GB simple data file stored on the older PC's HD, consisting almost exclusively of OrCad data files, to a DVD, first. Then, transferring the physical DVD to the new PC's DVD drive and using the copy command on the Windows 7 PC, I copied the DVD content, pasting it to My Documents folder in the new PC. This simple copying from a SATA DVD drive to a SATA HD on the new PC seemed to take forever, never finishing. Finally, I gave up, interrupting the copy process, after over two hours. In the mean time, monitoring the copying speed of only 250KB/s and considering that making the DVD on the old Windows XP PC had taken only a few minutes, I wondered what might be wrong with the new PC, suspecting the new HP DVD drive might be the culprit.
Before spending any undue time on the HP drive, I tried a USB backup drive containing the same OrCad file, coping it to the new PC's SATA HD--with the USB device attached directly and via an extesion cable to the PC--to become even more disappointed at a copying speed of no more than 1.3 MB/s.
Still, wanting to make sure the HP drive was functioning properly and was not the cause of any issues, I used its own Nero software included by HP, to burn the same OrCad file to a DVD diskette. Surprisingly, the drive performed flawlessly, writing the 2-GB file to the DVD in less than four minutes at a nominal speed of 22,160 KB/s; 22.1 MB/s.
Now, with the DVD made on the same Windows 7 PC, I again used the copy command and pasted its 2-GB content to the PC's SATA hard drive. This time around, somehow, the copying process went through, crawling all the way for over 28 minutes. Initially, the copying speed was 4 MB/s--but only for a second or two--and progressively dropping to 300KB/s and then, near the end of the process, slowly increasing to reach 1.6 MB/s before the copying was finished!
Obviously, something is seriously wrong with the Windows 7 copy/paste feature and it is clearly demonstrated by the fact that it simply should take a lot less time to copy a file to any hard drive--whether the file is stored on a DVD or a USB drive--than writing it to a DVD, something the copy feature cannot simply do. In fact, I have also tried to copy the same file to/from another identical WD SATA hard drive attached to one more SATA port on the motherboard acting as a back up drive, getting the same strange behavior.
Thank you very much for your assistance.