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Using win7 Disk manager to shrink disk... leaving partition too big
Running a freshly done re-install of win 7 64 bit.
I'm working on bringing the newly installed machine up to speed, and want to do it like the old OS that lasted 5 yrs was done.
That is, I broke the main OS disk into 2 pieces... so three total since the OS takes a tiny 200mb partition.
I guessed a good size would be 150 GB for the OS... 5 yrs ago. It turned out to be a bit close by the end of its career and was only 34GB shy of 150 GB.
So this time I thought I'd give it another 40GB making it around 190 GB.
So, cutting to the chase:
Using the OS tools, it appears the disk manager wants to keep around 250+ for the OS. I cannot see why this would be the case.
I have some screen grabs at the end showing the shrink dialog, and snap of the properties of the disk.
And know too that I have:
Tested and De-fragmented this disc, and it has been freshly reformatted too. All not long before starting work to shrink it.
The dialog (see image below) shows (Sz taken direct from the tool. Conversions from : Convert gigabyte to 248006 megabyte - Conversion of Measurement Units )
. . . . . size before shrink: 476838 - 465.66 GB
. . . . Shrinkable amount: 228832 - 223.47 GB
Total size after shrinking: 248006 - 242.12 GB
242 GB seems a bit hefty for the OS partition given the fact that it topped out at less than 150 GB after 5 yrs of use.
I'd really like to pare that down... but a little hesitant to get after it with Partition Wizard or the like.
So, I'm asking if I should heed this greedy estimate or go ahead and shrink it down to 180 GB, booting off Partition Wizard?
As you see from the image of disk properties, there is about 35 GB on there now, my estimate of 180 GB gives it room to grow by a of factor 500 %.