I am being very systematic and thorough in migrating over to Windows 7. I am doing it step-by-step … just so that I know what I am getting into.
Yesterday, I finally copied all of my data folders from my production XP machine to the C: disk of the Windows 7 machine.
Checked the amount of disk space used.
It was a cool 20GB more than what I had on my XP machine.
Did some checking.
Windows 7 ‘Windows’ folder = 13GB
XP ‘Windows’ folder = 6GB
So ‘Windows 7’ takes up twice as much disk space. OK. I can buy that. THOSE cool desktop images, in high-resolution, must take up some space. << smile >>
(But, to be realistic, my XP machine has twice as many fonts. But, I am OK with Windows 7 taking up 13GB).
My ‘Program Folder’ on the XP machine was 4GB larger than the TWO ‘Program Folders’ on the Windows 7 machine — one for 32-bit applications, the other for 64-bit.
So I looked at all of the hidden and Windows 7 files. WOW.
OK. Credit, where credit is due. Mike, who built my machine, had told me a couple of days ago that I used cut back on my Virtual Memory. Mike was right.
I have 12GB of real, very fast memory. As I write this I am using 13% of that.
My ‘pagefile.sys‘ file … used by Windows 7 … for Virtual Memory was 12GB.
Then there is also this ‘hiberfil.sys‘ file. Windows 7 uses it to store hibernation data … though this is a desktop … with system sleep set to ‘never.’ That is ~9GB.
BINGO. There is the additional 21GB of disk space.
I know some about Virtual Memory. Lucky enough to be working for IBM, in the early 1970s, when Virtual Memory hit the streets.
I cut back on my initial VM allocation. I now only allocate 4GB. 1/3 of my actual RAM.
Hope this helps.