Being a relative noob to Windows 7 (May 2012) I didn't realize how slow file copying or transfer was until I needed it on my dual-boot Win7 32 bit SP1/XP Home SP3 install.
I use DVD+RW to back up my data. When I actually needed to retrieve some of this data from burnt discs, in Win 7 my DVD writers spin very slowly, make all sorts of noises and the file transfer speed from the disc to my Desktop is less than 100KB/sec. When booting into XP Home SP3, the DVD drives spin up fast, and the transfer takes 6 minutes, 5 seconds. 526MB divided by 365 seconds = 1.44MB/sec
My test folder is a 528MB mix of web pages, text files, .jpegs, .pdfs, etc.
In Win7 32-bit, when I move or copy this test folder between drives or between partitions on the same drive, I get transfer speeds of anywhere from 4MB/sec to 8MB/sec. This is absurd!
My chipset drivers are up to date, and DMA is enabled in Device Manager (IDE mode). AHCI mode makes Windows Explorer hang. I tried disabling BITS and Remote Differential Compression, with no change. TeraCopy does not help. There are no SMART warnings. Even the SATA cables are brand new. What am I missing? If I ever need to totally rebuild my system from backups, I'll be here for months. Did MicroShaft really never fix this bug? Google searches show that the most chatter about this was in 2009 and 2010, so I'm assuming that there was a fix that I've overlooked.
Athlon II X4 640
4GB DDR3-1333 RAM
ASRock 880 GM-LE mobo
WD 160GB SATA II HD
Seagate 1TB SATA II HD
2~Samsung TSST SH-222AL DVD combo burners