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I have 1TB HDD with 800GB free space plus a typical System Reserved partition.
I removed system files before shrinking in Disk Management since suggested shrinking size was no more than 100GB
- pagefile
- hybernate
- system restore
- debug info
- disk clean up
rebooted and performed defrag in c: -> properties -> tools
That gave up to 800GB available shrink size, but still shrinking it in Disk Management to suggested or smaller amount results in
There is not enough space available on the disk(s) to complete this operation
It worked shrinking off small amounts like 100GB
Yes I did as I was confused. I tried with Disk Management and then diskpart. Shrinking to 700,500GB failed but I accidentally typed 200MB in diskpart and it worked with that amount unallocated appeared – Chesnokov Yuriy – 2014-07-11T19:32:59.523
yes I was thinking to finally try from live Ubuntu, hope it would not damage windows partion – Chesnokov Yuriy – 2014-07-11T19:35:32.127
It won't. Worst case you just need to run a chkdsk.exe and then try again. – Enigma – 2014-07-11T19:36:06.107
why it did cut 250MB? I just succeeded with 100GB more – Chesnokov Yuriy – 2014-07-11T19:40:11.710
It might be possible to safely shrink some small chunks if it wasn't claimed by anything but it's not recommended. The safer approach would be to unmount the disk and make partition changes when there is zero chance of reads/writes. – Enigma – 2014-07-11T19:43:09.207
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You might be able to clear more space by using a disk optimizer like http://www.auslogics.com/en/software/disk-defrag/ to push as much data as possible to the front of the disk. Usually the windows defragger does minimal defragging and doesn't optimize fully. The result is that while things aren't fragmented from eachother in terms of usage, you may still have small bits of data scattered about.
– Enigma – 2014-07-11T19:46:20.727I see, I thought 8.1 version supperted working on active partitions. Yes, I used windows default defragger – Chesnokov Yuriy – 2014-07-11T19:52:09.310
That is news to me but I would still recommend using GParted by either burning it to a CD or flashing it to a USB drive with a tool like: http://www.linuxliveusb.com/
– Enigma – 2014-07-11T19:55:47.193