How to change the defrag times

Can you change the defragmentation times because i dont want to leave my laptop on all night?

MartyFromTauranga wrote:
Can you change the defragmentation times because i dont want to leave my laptop on all night?
There is no need to leave the MBook on over night. There are a couple of clean-up-scripts starting if the system is idle (cpu usage is under a specific value) and if system starts up / shoot down.
If you (like I do) let the system run for weeks, by only putting the Mac to sleep state, it could be necesary to let the Mac run to idle state (first close all unneeded applications) every two weeks or so for a while.
The HFS+ filesystem needs no "defrag" as HFS+ optimizes the filestructure "on the fly" when deleting or adding files to the drive.
HFS+ uses a number of optimizations to the allocation algorithms in an attempt to defragment files while they are being accessed without a separate defragmenter.
If (very unlikely in normal operations) the filesystem does become fragmented, the only way to defragment it is to use a 3rd Party tool; or to wipe the hard drive completely and install the system from scratch.
Cheers - Lupunus

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