2009-10-21

Peer 2 Peer vs. Direct Copy

Well I was testing which would be faster to copy 276MB file between computers today. Direct copying from one computer to another over my wireless network took about 5 minutes at about 1MBps download speed that change randomly when windows felt like doing so. Next I tested the Peer 2 Peer (p2p) copying it only took 4 minutes with one server hosting the torrent and one client downloading the torrent on my network. I got speeds up to 1.1MBps and speed would drop a little when I was using the network heavy, which is normal to see. I can decrease my download time by adding two to three more server hosting the same torrent file which would increase the places the torrent can download pieces from. So in the future more testing of this theory of p2p being faster than direct copying over a local network. Tell me what you think or if you have any ideas or thoughts on this. Love to hear from people.

2009-10-14

Windows 7 - MSDN AA MD5 Hashes

Recently I have been having a problem with my Windows 7 ISOs and installations. Windows 7 will not install properly to my system. I have tried all of the "check your memory for corruption" as well as the "burn the ISO at a very slow rate" routines, but with no success. Typically I install Windows 7 from my thumb drive anyway because its probably 5x to 10x faster than by DVD. Also, I use the MSDN (Academic Alliance) images.

Just recently I checked the MD5 checksum of the image I was using to install Windows 7 and found that it did not match the MD5 checksum of the newly downloaded image direct from Microsoft's MSDN servers. Here are the MD5 checksums of the new images as well as the original image file names for reference.

Windows 7 Professional 64-bit
en_windows_7_professional_x64_dvd_X15-65805.iso
5aea8b512c2211e3f2c5c6e84698aaec

Windows 7 Professional 32-bit
en_windows_7_professional_x86_dvd_x15-65804.iso
d8f675aaeb48057452666b0cd686d7f5

Windows 7 Ultimate Release Candidate 64-bit
en_windows_7_ultimate_rc_x64_dvd_347803.iso
98341af35655137966e382c4feaa282d

Windows 7 Ultimate Release Candidate 32-bit
en_windows_7_ultimate_rc_x86_dvd_349010.iso
8867c13330f56a93944bcd46dcd73590

Windows 7 Beta 32-bit
en_windows_7_beta_dvd_x86_x15-29073.iso
f9dce6ebd0a63930b44d8ae802b63825

I really hope that this information will help anyone with a Windows 7 installation error. This should probably only be used in the case of an MSDN image installation though because I have not checked the RTM/OEM or retail images to see if any are the same.