I have a 300GB drive that is about 2/3 full. I tried to run full optimization multiple times, but it only moves about half of the files and then leaves the other half scattered all over the disk. Why isn't UltraDefrag able to calculate a sequence of moves that results in a fully-compacted drive, the way Defraggler and MyDefrag do? I've been using Defraggler, but would prefer to use UltraDefrag because it is able to do sorting. MyDefrag is terribly slow.
Last edit: Ben S. 2015-12-07
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UltraDefrag does it intentionally because movement of big files is irrelevant. The program moves only small files and fragments, as they affect system performance, and leaves all the rest as they're too big to affect it. However, you can force UltraDefrag to move everything, just click Settings > Options and adjust optimization parameters:
15 EB is the largest file size UltraDefrag accepts, so if you set threshold to this value you guarantee that everything below will be processed. In fact, at the moment nobody has such a big files on personal computers, so it would be also safe to use lower values, like so:
optimizer_file_size_threshold = "2 TB"
In case you have no larger files on your computer it will force to optimize all files as well.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I have a 300GB drive that is about 2/3 full. I tried to run full optimization multiple times, but it only moves about half of the files and then leaves the other half scattered all over the disk. Why isn't UltraDefrag able to calculate a sequence of moves that results in a fully-compacted drive, the way Defraggler and MyDefrag do? I've been using Defraggler, but would prefer to use UltraDefrag because it is able to do sorting. MyDefrag is terribly slow.
Last edit: Ben S. 2015-12-07
UltraDefrag does it intentionally because movement of big files is irrelevant. The program moves only small files and fragments, as they affect system performance, and leaves all the rest as they're too big to affect it. However, you can force UltraDefrag to move everything, just click Settings > Options and adjust optimization parameters:
More information can be found in UltraDefrag handbook: http://ultradefrag.sourceforge.net/handbook/
Thank You that worked ;) ... any way to Defrag Free Space ?
Last edit: Need_help 2015-12-10
EB means Exabyte: http://en.wikipedia.org/wiki/Exabyte
15 EB is the largest file size UltraDefrag accepts, so if you set threshold to this value you guarantee that everything below will be processed. In fact, at the moment nobody has such a big files on personal computers, so it would be also safe to use lower values, like so:
In case you have no larger files on your computer it will force to optimize all files as well.